From 7c7e43a11f43f909d45ef5ccc394498d55d73a18 Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Wed, 31 Jan 2024 11:24:49 +0100
Subject: [PATCH 01/30] added minus function

---
 src/main/c/main_taschenrechner.c | 4 ++++
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 79ece02..9727e18 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -10,3 +10,7 @@ int add(int a, int b) {
     return a+b;
     
 }
+
+int minus (int a, int b){
+    return a - b;
+}
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 1261fd7..0ebc004 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -3,4 +3,6 @@
 
 int add(int a, int b);
 
+int minus(int a, int b);
+
 #endif // TASCHENRECHNER_H

From 2088b143b6b6f4e2ac2e1b5fb9364a7781641521 Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Wed, 31 Jan 2024 11:33:20 +0100
Subject: [PATCH 02/30] added multiply function

---
 src/main/c/main_taschenrechner.c | 4 ++++
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 9727e18..cec5d6f 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -14,3 +14,7 @@ int add(int a, int b) {
 int minus (int a, int b){
     return a - b;
 }
+
+int multiply(int a, int b) {
+    return a * b;
+}
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 0ebc004..e1ca752 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -5,4 +5,6 @@ int add(int a, int b);
 
 int minus(int a, int b);
 
+int multiply(int a, int b);
+
 #endif // TASCHENRECHNER_H

From 0c9b2290c4a16a0c9f6e5c4453f3d3aa014ed3c7 Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Wed, 31 Jan 2024 11:39:42 +0100
Subject: [PATCH 03/30] added divide function

---
 src/main/c/main_taschenrechner.c | 6 ++++--
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index cec5d6f..74668c7 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -6,9 +6,7 @@
 
 
 int add(int a, int b) {
-    
     return a+b;
-    
 }
 
 int minus (int a, int b){
@@ -18,3 +16,7 @@ int minus (int a, int b){
 int multiply(int a, int b) {
     return a * b;
 }
+
+int divide(int a, int b) {
+    return a / b;
+}
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index e1ca752..3147d9d 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -7,4 +7,6 @@ int minus(int a, int b);
 
 int multiply(int a, int b);
 
+int divide(int a, int b);
+
 #endif // TASCHENRECHNER_H

From 0649393e9383ad67e3e40fb5beaf8a7f1b9b84fd Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 12:03:47 +0000
Subject: [PATCH 04/30] Added calculator modes functionality

---
 src/main/c/main_taschenrechner.c | 28 ++++++++++++++++++++++++++++
 src/main/c/taschenrechner.h      |  2 ++
 2 files changed, 30 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 74668c7..d4549dc 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -20,3 +20,31 @@ int multiply(int a, int b) {
 int divide(int a, int b) {
     return a / b;
 }
+
+int mode(int userChoice){
+
+    switch(userChoice) {
+
+        case 1:return 1; // Basic mode
+        break;
+
+        case 2:return 2; // Scientific mode (Trigonomertic functions, Logarithm and exponential functions.)
+        break;
+
+        case 3:return 3; // Graph mode (Draw and visualize functions.)
+        break;
+
+        case 4:return 4; // Programming mode (Binary , octal and hexadecimal )
+        break;
+
+        case 5:return 5; // Unit converter mode (length, weight volume etc.)
+        break;
+
+        case 0: return 0; // printf("Exiting the calculator.\n");
+        break;
+        
+        default: return -1; // printf("Invalid choice. Please try again.\n");
+
+    }
+
+}
\ No newline at end of file
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 3147d9d..d410b22 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -9,4 +9,6 @@ int multiply(int a, int b);
 
 int divide(int a, int b);
 
+int mode(int userChoice);
+
 #endif // TASCHENRECHNER_H

From c9c519066287ff1d73cf06f38d11087237b9c7d3 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 12:26:57 +0000
Subject: [PATCH 05/30] Added display menu functionality

---
 src/main/c/main_taschenrechner.c | 18 +++++++++++++++++-
 src/main/c/taschenrechner.h      |  2 ++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index d4549dc..c64ab30 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -6,7 +6,7 @@
 
 
 int add(int a, int b) {
-    return a+b;
+    return a + b;
 }
 
 int minus (int a, int b){
@@ -47,4 +47,20 @@ int mode(int userChoice){
 
     }
 
+}
+
+
+// display the mode options:
+
+int displayMenu(){
+
+    printf("\nCalculator Modes: \n");
+    printf("\n1: Basic Mode\n");
+    printf("\n2: Scientific Mode (Trigonomertic functions, Logarithm and exponential functions.)\n");
+    printf("\n3: Graph Mode (Draw and visualize functions.)\n");
+    printf("\n4: Programming Mode (Binary , octal and hexadecimal )\n");
+    printf("\n5: Unit converter Mode (length, weight volume etc.)\n");
+    printf("\n0: Exit calculator\n");
+
+    return 1; // return 1 to check if the function works 
 }
\ No newline at end of file
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index d410b22..5bbfe6b 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -11,4 +11,6 @@ int divide(int a, int b);
 
 int mode(int userChoice);
 
+int displayMenu();
+
 #endif // TASCHENRECHNER_H

From 7a88cae1230b61928fe1601be2e74e2a2495cf28 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 14:11:00 +0000
Subject: [PATCH 06/30] Added scientificMode function with user input (no
 functionality yet)

---
 src/main/c/main_taschenrechner.c | 46 ++++++++++++++++++++++++++++++--
 1 file changed, 44 insertions(+), 2 deletions(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index c64ab30..526d9e9 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
-// #include <string.h>
+#include <string.h>
 #include <stdlib.h>
+#include <math.h>
 
 #include "taschenrechner.h"
 
@@ -21,6 +22,48 @@ int divide(int a, int b) {
     return a / b;
 }
 
+// scientificmode
+
+int scientificmode(){
+
+    double num, result;
+
+    int choice;
+
+    printf("Enter a number: ");
+
+    scanf("%lf", &num); // scan the number from user
+    
+    printf("Scientific mode Options:\n");
+    printf("1: Square root:\n");
+    printf("2: Exponential:\n");
+    printf("2: Logarithm:\n");
+    printf("4: Trigonomertic");
+    scanf("%d", &choice); // user choice
+
+    switch(choice) {
+
+        case 1: // Square root
+        break;
+
+        case 2: // Exponential
+        break;
+
+        case 3: // Logarithm
+        break;
+
+        case 4: // Trigonomertic 
+        break;
+    
+        default: printf("Invalid choice. Please try again.\n");
+
+    }
+
+    return result;
+}
+
+
+// change mode
 int mode(int userChoice){
 
     switch(userChoice) {
@@ -51,7 +94,6 @@ int mode(int userChoice){
 
 
 // display the mode options:
-
 int displayMenu(){
 
     printf("\nCalculator Modes: \n");

From 97217b687c733aaa5de1cb297cb92b0b69c0f12a Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 19:20:11 +0000
Subject: [PATCH 07/30] Added graph mode for testing with basic sin function
 table

---
 src/main/c/main_taschenrechner.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 526d9e9..7645288 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -22,9 +22,10 @@ int divide(int a, int b) {
     return a / b;
 }
 
+// 
 // scientificmode
 
-int scientificmode(){
+int scientificMode(){
 
     double num, result;
 
@@ -62,6 +63,25 @@ int scientificmode(){
     return result;
 }
 
+// graphMode
+void graphMode() {
+    double x, y;
+
+    printf("Enter the range for x (start end step): ");
+    double x_start, x_end, x_step;
+    scanf("%lf %lf %lf", &x_start, &x_end, &x_step);
+
+    printf("\nGraph for the function y = sin(x):\n");
+
+    printf(" x\t| y\n");
+    printf("--------------\n");
+
+    for (x = x_start; x <= x_end; x += x_step) {
+        y = sin(x);
+        printf("%.2lf\t| %.2lf\n", x, y);
+    }
+}
+
 
 // change mode
 int mode(int userChoice){

From 550fe3158208681bb3dbc17f156b1f3ae206e45c Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 21:07:36 +0000
Subject: [PATCH 08/30] Added programming mode without functionality

---
 src/main/c/main_taschenrechner.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 7645288..574ad40 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -82,6 +82,24 @@ void graphMode() {
     }
 }
 
+// Programming mode
+
+void programmingMode() {
+
+    int num1, num2, result;
+    char operator;
+
+    printf("Enter first integer: ");
+    scanf("%d", &num1);
+
+    printf("Enter operator (+, -, *, /): ");
+    scanf(" %c", &operator);
+
+    printf("Enter second integer: ");
+    scanf("%d", &num2);
+
+}
+
 
 // change mode
 int mode(int userChoice){

From 1b98800df7ab1fd922ebcc19409153e328bc7274 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Thu, 1 Feb 2024 21:15:38 +0000
Subject: [PATCH 09/30] Added Unit Converter mode without functionality

---
 src/main/c/main_taschenrechner.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 574ad40..60e57f1 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -22,7 +22,7 @@ int divide(int a, int b) {
     return a / b;
 }
 
-// 
+
 // scientificmode
 
 int scientificMode(){
@@ -100,6 +100,23 @@ void programmingMode() {
 
 }
 
+// Unit converter mode
+
+void unitConverterMode() {
+    int choice;
+    double value, result;
+
+    printf("Unit Converter Mode:\n");
+    printf("1. Meter to Kilometer\n");
+    printf("2. Kilogram to Gram\n");
+    printf("3. Celsius to Fahrenheit\n");
+    printf("Enter your choice: ");
+    scanf("%d", &choice);
+
+    printf("Enter the value to convert: ");
+    scanf("%lf", &value);
+
+}
 
 // change mode
 int mode(int userChoice){

From 8d69bf6c8ff17a3467b228cb6c6215dc95c7c345 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:18:30 +0000
Subject: [PATCH 10/30] Added sineFunction for trigonometric calculations

---
 src/main/c/main_taschenrechner.c | 6 ++++++
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 60e57f1..f407180 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -22,6 +22,12 @@ int divide(int a, int b) {
     return a / b;
 }
 
+// Trigonometric functions
+double sineFunction(double angle) {
+    // Convert degrees to radians for trigonometric functions
+    return sin(angle * M_PI / 180.0);
+}
+
 
 // scientificmode
 
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 5bbfe6b..1ca10c6 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -9,6 +9,8 @@ int multiply(int a, int b);
 
 int divide(int a, int b);
 
+double sineFunction(double angle);
+
 int mode(int userChoice);
 
 int displayMenu();

From 5e548b90e558e2a3a232706fc7ee42cf4aa7e20f Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:21:46 +0000
Subject: [PATCH 11/30] Added cosine function for trigonometric calculations

---
 src/main/c/main_taschenrechner.c | 6 ++++++
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index f407180..d99a933 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -29,6 +29,12 @@ double sineFunction(double angle) {
 }
 
 
+double cosineFunction(double angle) {
+    // Convert degrees to radians for trigonometric functions
+    return cos(angle * M_PI / 180.0);
+}
+
+
 // scientificmode
 
 int scientificMode(){
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 1ca10c6..a5b9d40 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -11,6 +11,8 @@ int divide(int a, int b);
 
 double sineFunction(double angle);
 
+double cosineFunction(double angle);
+
 int mode(int userChoice);
 
 int displayMenu();

From 51fe20da4ff82dffd8784b79772fa0388c836efa Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:24:34 +0000
Subject: [PATCH 12/30] Added tangent function for trigonometric calculations

---
 src/main/c/main_taschenrechner.c | 4 ++++
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index d99a933..20b7c33 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -34,6 +34,10 @@ double cosineFunction(double angle) {
     return cos(angle * M_PI / 180.0);
 }
 
+double tangentFunction(double angle) {
+    // Convert degrees to radians for trigonometric functions
+    return tan(angle * M_PI / 180.0);
+}
 
 // scientificmode
 
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index a5b9d40..a2b16d0 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -13,6 +13,8 @@ double sineFunction(double angle);
 
 double cosineFunction(double angle);
 
+double tangentFunction(double angle);
+
 int mode(int userChoice);
 
 int displayMenu();

From 0a09383b1eefad0baab83cb424b072538e95572e Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:27:26 +0000
Subject: [PATCH 13/30] Added logarithm function for base 10 logarithmic
 calculations

---
 src/main/c/main_taschenrechner.c | 9 ++++++++-
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 20b7c33..9158895 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -39,8 +39,15 @@ double tangentFunction(double angle) {
     return tan(angle * M_PI / 180.0);
 }
 
-// scientificmode
+// Logarithmic functions
+double logarithmFunction(double x) {
+    // Logarithm with base 10
+    return log10(x);
+}
+ 
 
+
+// scientificmode
 int scientificMode(){
 
     double num, result;
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index a2b16d0..d177979 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -15,6 +15,8 @@ double cosineFunction(double angle);
 
 double tangentFunction(double angle);
 
+double logarithmFunction(double x);
+
 int mode(int userChoice);
 
 int displayMenu();

From 4e07ded997065a63883a9273cc4062011433136b Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:33:23 +0000
Subject: [PATCH 14/30] Added naturalLogarithmFunction (ln) for natural
 logarithmic calculations

---
 src/main/c/main_taschenrechner.c | 5 +++++
 src/main/c/taschenrechner.h      | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 9158895..eb9dad3 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -44,6 +44,11 @@ double logarithmFunction(double x) {
     // Logarithm with base 10
     return log10(x);
 }
+
+double naturalLogarithmFunction(double x) {
+    // Natural logarithm (ln)
+    return log(x);
+}
  
 
 
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index d177979..071fba0 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -9,14 +9,19 @@ int multiply(int a, int b);
 
 int divide(int a, int b);
 
+// Trigonometric functions
 double sineFunction(double angle);
 
 double cosineFunction(double angle);
 
 double tangentFunction(double angle);
 
+//..
+// Logarithmic functions
 double logarithmFunction(double x);
 
+double naturalLogarithmFunction(double x);
+
 int mode(int userChoice);
 
 int displayMenu();

From 03d5c29ff670d1179098b89ca93ad5a8a24ce5e3 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:40:57 +0000
Subject: [PATCH 15/30] Added logarithmBase2Function for base 2 logarithmic
 calculations

---
 src/main/c/main_taschenrechner.c | 6 +++++-
 src/main/c/taschenrechner.h      | 2 ++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index eb9dad3..6820e7f 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -39,6 +39,7 @@ double tangentFunction(double angle) {
     return tan(angle * M_PI / 180.0);
 }
 
+//..
 // Logarithmic functions
 double logarithmFunction(double x) {
     // Logarithm with base 10
@@ -49,8 +50,11 @@ double naturalLogarithmFunction(double x) {
     // Natural logarithm (ln)
     return log(x);
 }
- 
 
+double logarithmBase2Function(double x) {
+    // Logarithm with base 2
+    return log2(x);
+}
 
 // scientificmode
 int scientificMode(){
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 071fba0..1032900 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -22,6 +22,8 @@ double logarithmFunction(double x);
 
 double naturalLogarithmFunction(double x);
 
+double logarithmBase2Function(double x);
+
 int mode(int userChoice);
 
 int displayMenu();

From 440d7f5c25c789879bdf5517b1709a38a38dafca Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:43:33 +0000
Subject: [PATCH 16/30] Added exponentialFunction for exponential calculations

---
 src/main/c/main_taschenrechner.c | 7 +++++++
 src/main/c/taschenrechner.h      | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index 6820e7f..fe59f96 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -55,6 +55,13 @@ double logarithmBase2Function(double x) {
     // Logarithm with base 2
     return log2(x);
 }
+//..
+// Exponential function
+double exponentialFunction(double x) {
+    // Exponential function (e^x)
+    return exp(x);
+}
+
 
 // scientificmode
 int scientificMode(){
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 1032900..17f2ce2 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -24,6 +24,10 @@ double naturalLogarithmFunction(double x);
 
 double logarithmBase2Function(double x);
 
+//..
+// Exponential function
+double exponentialFunction(double x);
+
 int mode(int userChoice);
 
 int displayMenu();

From 08980879044d5fe5885dfab94b44a15eccfb4844 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:55:05 +0000
Subject: [PATCH 17/30] Added bitwiseAND function for bitwise AND operation

---
 src/main/c/main_taschenrechner.c | 5 +++++
 src/main/c/taschenrechner.h      | 4 ++++
 2 files changed, 9 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index fe59f96..e365a95 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -62,6 +62,11 @@ double exponentialFunction(double x) {
     return exp(x);
 }
 
+// ..
+// Bitwise AND function
+int bitwiseAND(int num1, int num2) {
+    return num1 & num2;
+}
 
 // scientificmode
 int scientificMode(){
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 17f2ce2..866141a 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -28,6 +28,10 @@ double logarithmBase2Function(double x);
 // Exponential function
 double exponentialFunction(double x);
 
+// ..
+// Bitwise AND function
+int bitwiseAND(int num1, int num2);
+
 int mode(int userChoice);
 
 int displayMenu();

From 0cc8033f3103513d6122cabfa6b245affcdfb5e6 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:56:53 +0000
Subject: [PATCH 18/30] Added bitwiseOR function for bitwise OR operation

---
 src/main/c/main_taschenrechner.c | 6 ++++++
 src/main/c/taschenrechner.h      | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index e365a95..e0bb699 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -68,6 +68,12 @@ int bitwiseAND(int num1, int num2) {
     return num1 & num2;
 }
 
+// Bitwise OR function
+int bitwiseOR(int num1, int num2) {
+    return num1 | num2;
+}
+
+
 // scientificmode
 int scientificMode(){
 
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 866141a..b3cc747 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -32,6 +32,9 @@ double exponentialFunction(double x);
 // Bitwise AND function
 int bitwiseAND(int num1, int num2);
 
+// Bitwise OR function
+int bitwiseOR(int num1, int num2);
+
 int mode(int userChoice);
 
 int displayMenu();

From 8993cdde83dfcd3fa9b1afd0bafe9975583d03e3 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 15:59:18 +0000
Subject: [PATCH 19/30] Added bitwiseXOR function for bitwise XOR operation

---
 src/main/c/main_taschenrechner.c | 6 ++++++
 src/main/c/taschenrechner.h      | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index e0bb699..d9bda36 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -73,6 +73,12 @@ int bitwiseOR(int num1, int num2) {
     return num1 | num2;
 }
 
+// Bitwise XOR function
+int bitwiseXOR(int num1, int num2) {
+    return num1 ^ num2;
+}
+
+//..
 
 // scientificmode
 int scientificMode(){
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index b3cc747..76acfb3 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -35,6 +35,9 @@ int bitwiseAND(int num1, int num2);
 // Bitwise OR function
 int bitwiseOR(int num1, int num2);
 
+// Bitwise XOR function
+int bitwiseXOR(int num1, int num2);
+
 int mode(int userChoice);
 
 int displayMenu();

From 1a2e13f0c74a65bef60b88425037d4eff3cd7d1d Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Fri, 2 Feb 2024 16:03:53 +0000
Subject: [PATCH 20/30] Added squareRootFunction for calculating square roots

---
 src/main/c/main_taschenrechner.c | 7 +++++++
 src/main/c/taschenrechner.h      | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index d9bda36..af494d1 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -22,6 +22,13 @@ int divide(int a, int b) {
     return a / b;
 }
 
+// Square root function
+double squareRootFunction(double x) {
+    // Using the sqrt function from math.h
+    return sqrt(x);
+}
+
+//..
 // Trigonometric functions
 double sineFunction(double angle) {
     // Convert degrees to radians for trigonometric functions
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 76acfb3..1053da9 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -9,6 +9,10 @@ int multiply(int a, int b);
 
 int divide(int a, int b);
 
+// Square root function
+double squareRootFunction(double x);
+
+//..
 // Trigonometric functions
 double sineFunction(double angle);
 

From b35930f9c55928361b96e762a32ba94e67a1a855 Mon Sep 17 00:00:00 2001
From: lukazieg <2003lukas.zie@gmail.com>
Date: Sat, 3 Feb 2024 11:24:06 +0100
Subject: [PATCH 21/30] added testForNumber.c

---
 src/main/c/testForNumber.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/main/c/testForNumber.c

diff --git a/src/main/c/testForNumber.c b/src/main/c/testForNumber.c
new file mode 100644
index 0000000..89784ed
--- /dev/null
+++ b/src/main/c/testForNumber.c
@@ -0,0 +1,23 @@
+double testForNumber() {
+    double num;
+    char storage[25];
+    char* notANumber;
+
+    do {
+        //Emptys the standart output buffer to ensure that this function works in loops
+        //and returns the value of num after every loop
+        fflush(stdout);
+
+        //fgets() reads the user input into the buffer storage (storage)
+        //the if condition is true as long as the input isn't empty
+        if (fgets(storage, sizeof storage, stdin) != NULL) {
+            //strtod() tries to convert the input into a double
+            //if there is anything but a number at any point of the array the pointer notANumber will point to this position
+            num = strtod(storage, &notANumber);
+        }
+        //isspace makes sure that notANumber doesn't point to an empty space
+        //the secount part makes sure that notANumber isn't pointing at 0
+    } while (!isspace(*notANumber) && *notANumber != 0);
+
+    return num;
+}
\ No newline at end of file

From 944e3a15446f334563f26ff008fc9c9ccf3f4d61 Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 11:56:50 +0100
Subject: [PATCH 22/30] unit tests added and adjusted calculations with double

---
 src/main/c/main_taschenrechner.c | 11 +++++++----
 src/main/c/taschenrechner.h      |  8 ++++----
 src/test/c/test_taschenrechner.c | 27 +++++++++++++++++++++------
 3 files changed, 32 insertions(+), 14 deletions(-)

diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index af494d1..f1fccac 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -6,19 +6,22 @@
 #include "taschenrechner.h"
 
 
-int add(int a, int b) {
+doulbe add(doulbe a, doulbe b) {
     return a + b;
 }
 
-int minus (int a, int b){
+doulbe minus (doulbe a, doulbe b){
     return a - b;
 }
 
-int multiply(int a, int b) {
+doulbe multiply(doulbe a, doulbe b) {
     return a * b;
 }
 
-int divide(int a, int b) {
+doulbe divide(doulbe a, doulbe b) {
+    if (b == 0) {
+        return 0;
+    }
     return a / b;
 }
 
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 1053da9..7b548f9 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -1,13 +1,13 @@
 #ifndef TASCHENRECHNER_H
 #define TASCHENRECHNER_H
 
-int add(int a, int b);
+doulbe add(doulbe a, doulbe b);
 
-int minus(int a, int b);
+doulbe minus(doulbe a, doulbe b);
 
-int multiply(int a, int b);
+doulbe multiply(doulbe a, doulbe b);
 
-int divide(int a, int b);
+doulbe divide(doulbe a, doulbe b);
 
 // Square root function
 double squareRootFunction(double x);
diff --git a/src/test/c/test_taschenrechner.c b/src/test/c/test_taschenrechner.c
index d3fc8c9..6ad4cc7 100644
--- a/src/test/c/test_taschenrechner.c
+++ b/src/test/c/test_taschenrechner.c
@@ -14,14 +14,29 @@ void tearDown(void)
 
 void test_addition(void)
 {
-    /* arrange */
-    char* result;
-    char expected[] = "2\n";
+    doulbe result = add(1, 2);
+    TEST_ASSERT_EQUAL(3, result);
+}
+
+void test_minus(void)
+{
+    doulbe result = minus(3, 1);
+    TEST_ASSERT_EQUAL(2, result);
+}
 
-    /* act */
-    result = convert(2);
+void test_multiply(void)
+{
+    doulbe result = multiply(1, 2);
+    TEST_ASSERT_EQUAL(2, result);
+}
+
+void test_divide(void)
+{
+    doulbe result = divide(4, 2);
+    TEST_ASSERT_EQUAL(2, result);
 
-    /* assert */
+    doulbe result1 = divide(4, 0);
+    TEST_ASSERT_EQUAL(0, result1);
 }
 
 #endif // TEST

From 8b6ad397fef77d124dcba0db124d4507963e4cae Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 12:49:17 +0100
Subject: [PATCH 23/30] added new File BasicMode.c for Basic calculations

---
 src/main/c/BasicMode.c           | 9 +++++++++
 src/main/c/main_taschenrechner.c | 1 +
 2 files changed, 10 insertions(+)
 create mode 100644 src/main/c/BasicMode.c

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
new file mode 100644
index 0000000..30a7779
--- /dev/null
+++ b/src/main/c/BasicMode.c
@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "taschenrechner.h"
+#include "main_taschenrechner.c"
+
+
diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index f1fccac..dbe0447 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -4,6 +4,7 @@
 #include <math.h>
 
 #include "taschenrechner.h"
+#include "BasicMode.c"
 
 
 doulbe add(doulbe a, doulbe b) {

From bd2e1ef19fc64af699107016105b8c6e08e6b815 Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 12:53:58 +0100
Subject: [PATCH 24/30] refractoring

---
 src/main/c/BasicMode.c           | 1 -
 src/main/c/main_taschenrechner.c | 1 -
 src/main/c/taschenrechner.h      | 7 +++++++
 src/main/c/testForNumber.c       | 7 +++++++
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index 30a7779..9904742 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -4,6 +4,5 @@
 #include <math.h>
 
 #include "taschenrechner.h"
-#include "main_taschenrechner.c"
 
 
diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index dbe0447..f1fccac 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -4,7 +4,6 @@
 #include <math.h>
 
 #include "taschenrechner.h"
-#include "BasicMode.c"
 
 
 doulbe add(doulbe a, doulbe b) {
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 7b548f9..23cc26f 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -1,14 +1,21 @@
 #ifndef TASCHENRECHNER_H
 #define TASCHENRECHNER_H
 
+//add function
 doulbe add(doulbe a, doulbe b);
 
+//minus function
 doulbe minus(doulbe a, doulbe b);
 
+//multiply function
 doulbe multiply(doulbe a, doulbe b);
 
+//divide function
 doulbe divide(doulbe a, doulbe b);
 
+//get input and check if its a number
+double testForNumber()
+
 // Square root function
 double squareRootFunction(double x);
 
diff --git a/src/main/c/testForNumber.c b/src/main/c/testForNumber.c
index 89784ed..06438d1 100644
--- a/src/main/c/testForNumber.c
+++ b/src/main/c/testForNumber.c
@@ -1,3 +1,10 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "taschenrechner.h"
+
 double testForNumber() {
     double num;
     char storage[25];

From a3cbfd7de1d0f83a90f0822b5abb162180971f1f Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 16:59:42 +0100
Subject: [PATCH 25/30] added BasicMode.c and refractoring to
 testForOperator/taschenrechner.h

---
 src/main/c/BasicMode.c       |  64 ++++++++++++++++---
 src/main/c/taschenrechner.h  | 115 ++++++++++++++++++-----------------
 src/main/c/testForOperator.c |  28 +++++++++
 3 files changed, 143 insertions(+), 64 deletions(-)
 create mode 100644 src/main/c/testForOperator.c

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index 9904742..396440f 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -1,8 +1,56 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <math.h>
-
-#include "taschenrechner.h"
-
-
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "taschenrechner.h"
+
+
+void BasicMode() {
+	char endtmp = '0';	//0 false, 1 true
+	double result = 0;
+	double numbers[100] = {0.0};
+	char operatoren[100];
+
+	do {
+		//100 doubles in this array  goes through the for loop till 100 numbers or = is entered
+		for (int i = 0; i < 100) {
+			printf("Enter a Number: ");
+			numbers[i] = testForNumber();	//gets number
+
+			printf("Enter a operation: ");
+			operator[i] = testForOperator();	//gets operator
+
+			if (i > 1) {	//if function to prevent numbers[-1] 
+				switch (operator[i])		//checks of the operator and switches to the case with the needed function
+				{
+				case '+': 
+					result += add(numbers[i - 1], numbers[i])
+					break;
+
+				case '-':
+					result += minus(numbers[i - 1], numbers[i])
+					break;
+
+				case '*':
+					result += multiply(numbers[i - 1], numbers[i])
+					break;
+
+				case '/':
+					result += divide(numbers[i - 1], numbers[i])
+					break;
+
+				case '=':
+					printf("The result is: %d", result);
+					endtmp = 1;
+					break;
+
+				default:
+					break;
+				}
+			}
+			i++;
+		}
+	} while (endtmp != '1')
+
+}
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 23cc26f..3855a6c 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -1,56 +1,59 @@
-#ifndef TASCHENRECHNER_H
-#define TASCHENRECHNER_H
-
-//add function
-doulbe add(doulbe a, doulbe b);
-
-//minus function
-doulbe minus(doulbe a, doulbe b);
-
-//multiply function
-doulbe multiply(doulbe a, doulbe b);
-
-//divide function
-doulbe divide(doulbe a, doulbe b);
-
-//get input and check if its a number
-double testForNumber()
-
-// Square root function
-double squareRootFunction(double x);
-
-//..
-// Trigonometric functions
-double sineFunction(double angle);
-
-double cosineFunction(double angle);
-
-double tangentFunction(double angle);
-
-//..
-// Logarithmic functions
-double logarithmFunction(double x);
-
-double naturalLogarithmFunction(double x);
-
-double logarithmBase2Function(double x);
-
-//..
-// Exponential function
-double exponentialFunction(double x);
-
-// ..
-// Bitwise AND function
-int bitwiseAND(int num1, int num2);
-
-// Bitwise OR function
-int bitwiseOR(int num1, int num2);
-
-// Bitwise XOR function
-int bitwiseXOR(int num1, int num2);
-
-int mode(int userChoice);
-
-int displayMenu();
-
-#endif // TASCHENRECHNER_H
+#ifndef TASCHENRECHNER_H
+#define TASCHENRECHNER_H
+
+//add function
+doulbe add(doulbe a, doulbe b);
+
+//minus function
+doulbe minus(doulbe a, doulbe b);
+
+//multiply function
+doulbe multiply(doulbe a, doulbe b);
+
+//divide function
+doulbe divide(doulbe a, doulbe b);
+
+//get input and check if its a number
+double testForNumber()
+
+//get input and check if its a operator
+char testForOperator()
+
+// Square root function
+double squareRootFunction(double x);
+
+//..
+// Trigonometric functions
+double sineFunction(double angle);
+
+double cosineFunction(double angle);
+
+double tangentFunction(double angle);
+
+//..
+// Logarithmic functions
+double logarithmFunction(double x);
+
+double naturalLogarithmFunction(double x);
+
+double logarithmBase2Function(double x);
+
+//..
+// Exponential function
+double exponentialFunction(double x);
+
+// ..
+// Bitwise AND function
+int bitwiseAND(int num1, int num2);
+
+// Bitwise OR function
+int bitwiseOR(int num1, int num2);
+
+// Bitwise XOR function
+int bitwiseXOR(int num1, int num2);
+
+int mode(int userChoice);
+
+int displayMenu();
+
+#endif // TASCHENRECHNER_H
diff --git a/src/main/c/testForOperator.c b/src/main/c/testForOperator.c
new file mode 100644
index 0000000..51b1931
--- /dev/null
+++ b/src/main/c/testForOperator.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include "taschenrechner.h"
+
+char testForOperator() {
+    //saving the number of operators in a variable so it only needs to be changed in one location
+    int numberOfOperators = 5;
+    //array where all valid Operators are saved, can be esily expanded
+    char oppArray[numberOfOperators] = { '+','-','*','/','=' };
+    char input;
+    bool validInput = false;
+
+    //Loops as long as input isn't valid, enters at least one time
+    while (!validInput) {
+        scanf_s("%c\n", &input);
+        //checks every position of the array if a position is equal to input returns the input, which also stopps the function
+        for (int i = 0; i <= numberOfOperators; i++) {
+            if (input == oppArray[i]) {
+                return input;
+            }
+        }
+        //if the input was deemed invalid it asks for new input and goes to the top of the while loop
+        printf("Diese Eigabe war nicht zulässig probieren sie es noch einmal!\n");
+    }
+}
\ No newline at end of file

From 09e4f9d6b77c12f9925c0e7b049d83129d3a3d5f Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 17:40:32 +0100
Subject: [PATCH 26/30] changed BasicMode.c to priorities operators

---
 src/main/c/BasicMode.c | 62 ++++++++++++++++++++----------------------
 1 file changed, 30 insertions(+), 32 deletions(-)

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index 396440f..f68a11a 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -10,7 +10,7 @@ void BasicMode() {
 	char endtmp = '0';	//0 false, 1 true
 	double result = 0;
 	double numbers[100] = {0.0};
-	char operatoren[100];
+	char operators[100];
 
 	do {
 		//100 doubles in this array  goes through the for loop till 100 numbers or = is entered
@@ -19,38 +19,36 @@ void BasicMode() {
 			numbers[i] = testForNumber();	//gets number
 
 			printf("Enter a operation: ");
-			operator[i] = testForOperator();	//gets operator
-
-			if (i > 1) {	//if function to prevent numbers[-1] 
-				switch (operator[i])		//checks of the operator and switches to the case with the needed function
-				{
-				case '+': 
-					result += add(numbers[i - 1], numbers[i])
-					break;
-
-				case '-':
-					result += minus(numbers[i - 1], numbers[i])
-					break;
-
-				case '*':
-					result += multiply(numbers[i - 1], numbers[i])
-					break;
-
-				case '/':
-					result += divide(numbers[i - 1], numbers[i])
-					break;
-
-				case '=':
-					printf("The result is: %d", result);
-					endtmp = 1;
-					break;
-
-				default:
-					break;
-				}
-			}
-			i++;
+			operators[i] = testForOperator();	//gets operator
 		}
 	} while (endtmp != '1')
 
+
+	for (int i = 0; i < 100) {//checks all operators to check for priority
+		if ((operators[i] == '/' || operators[i] == '*') && i > 1) {	//if operators[i] == / or * and i>1 so you dont get numbers[-1]
+			if (operators[i] == '/') {
+				result += divide(numbers[i - 1], numbers[i]);		//divides if char is / and adds number to the result 
+			}
+																	//	for all calculations we take the number and the number before that 
+			else {													//	and do the operation 
+				result += multiply(numbers[i - 1], numbers[i]);		//multiplys if char is * and adds number to the result 
+			}
+		}
+		
+		else if ((operators[i] == '+' || operators[i] == '-') && i > 1) {
+			if (operators[i] == '+') {
+				result += add(numbers[i - 1], numbers[i]);		//adds if char is + and adds number to the result
+			}
+
+			else {
+				result += minus(numbers[i - 1], numbers[i]);		//subtrakts if char is - and adds number to the result
+			}
+		}
+
+		else if (i<=1 && operator[i] == '=') {		//if there are less then 2 numbers in the array 
+			result = numbers[i];					//set result to the 0 digit
+		}
+		i++;
+	}
+	printf("The result is: %d", result);
 }

From cc11e6eccd60ea42b1141f358abb9c643a1e6dfb Mon Sep 17 00:00:00 2001
From: Enrico Schellenberger
 <enrico-nicolai.schellenberger@informatik.hs-fulda.de>
Date: Sat, 3 Feb 2024 17:45:29 +0100
Subject: [PATCH 27/30] changed the last else if in BasicMode.c to include the
 = char

---
 src/main/c/BasicMode.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index f68a11a..cfb5ded 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -48,7 +48,12 @@ void BasicMode() {
 		else if (i<=1 && operator[i] == '=') {		//if there are less then 2 numbers in the array 
 			result = numbers[i];					//set result to the 0 digit
 		}
+
+		else if (operator[i] == '=') {				//if char is = 
+			printf("The result is: %d", result);	//print out the result
+			i = 100; 
+			break;
+		}
 		i++;
 	}
-	printf("The result is: %d", result);
 }

From cd40c3a9b40d0d5029383b23e995e2c65dd05a5e Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Sun, 4 Feb 2024 15:12:40 +0000
Subject: [PATCH 28/30] Updated Ceedling YAML for project structure

---
 project.yml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/project.yml b/project.yml
index dac0d93..a360bc3 100644
--- a/project.yml
+++ b/project.yml
@@ -34,7 +34,7 @@
     - +:src/test/c/**
     - -:src/test/c/support
   :source:
-    - src/main/c/**
+    - +:src/main/c/**
   :support:
     - src/test/c/support
   :libraries: []
@@ -98,4 +98,3 @@
   :enabled:
     - stdout_pretty_tests_report
     - module_generator
-...

From ed3952a199900d04250bcc4a92dfbb1e7494335d Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Sun, 4 Feb 2024 18:45:48 +0000
Subject: [PATCH 29/30] Updated build script and Ceedling configuration

---
 create_folders.sh | 13 +++++++++++--
 project.yml       | 15 ++++++++++++---
 2 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/create_folders.sh b/create_folders.sh
index 3d96d3e..5d73167 100644
--- a/create_folders.sh
+++ b/create_folders.sh
@@ -1,2 +1,11 @@
-mkdir -p src/main/c
-mkdir -p src/test/c/support
+#!/bin/bash
+
+# Check if a Ceedling project exists
+if [ -f "project.yml" ]; then
+    echo "Building and testing C project with Ceedling..."
+    ceedling test:all
+    exit $?
+else
+    echo "No Ceedling project found in the current directory."
+    exit 1
+fi
diff --git a/project.yml b/project.yml
index a360bc3..4801bd7 100644
--- a/project.yml
+++ b/project.yml
@@ -88,9 +88,18 @@
   :placement: :end
   :flag: "-l${1}"
   :path_flag: "-L ${1}"
-  :system: []    # for example, you might list 'm' to grab the math library
-  :test: []
-  :release: []
+  :system:
+    - m  # Example: add 'm' to use the math library
+  :test:
+    - stdio
+    - string
+    - stdlib
+    - m  # Example: add 'm' to use the math library in tests
+  :release:
+    - stdio
+    - string
+    - stdlib
+    - m  # Example: add 'm' to use the math library in release builds
 
 :plugins:
   :load_paths:

From b3773ad434c616376f18ba9d8d55e49c460483c0 Mon Sep 17 00:00:00 2001
From: fdai7782 <jatin.saroay1@informatik.hs-fulda.de>
Date: Sun, 4 Feb 2024 19:43:33 +0000
Subject: [PATCH 30/30] Fixed syntax errors in team member's code

---
 src/main/c/BasicMode.c           | 12 ++++++------
 src/main/c/main_taschenrechner.c |  8 ++++----
 src/main/c/taschenrechner.h      | 12 ++++++------
 src/main/c/testForOperator.c     |  5 +++--
 4 files changed, 19 insertions(+), 18 deletions(-)

diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index cfb5ded..f6101c3 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -14,17 +14,17 @@ void BasicMode() {
 
 	do {
 		//100 doubles in this array  goes through the for loop till 100 numbers or = is entered
-		for (int i = 0; i < 100) {
+		for (int i = 0; i < 100; i++) {
 			printf("Enter a Number: ");
 			numbers[i] = testForNumber();	//gets number
 
 			printf("Enter a operation: ");
 			operators[i] = testForOperator();	//gets operator
 		}
-	} while (endtmp != '1')
+	} while (endtmp != '1');
 
 
-	for (int i = 0; i < 100) {//checks all operators to check for priority
+	for (int i = 0; i < 100; i++) {//checks all operators to check for priority
 		if ((operators[i] == '/' || operators[i] == '*') && i > 1) {	//if operators[i] == / or * and i>1 so you dont get numbers[-1]
 			if (operators[i] == '/') {
 				result += divide(numbers[i - 1], numbers[i]);		//divides if char is / and adds number to the result 
@@ -45,12 +45,12 @@ void BasicMode() {
 			}
 		}
 
-		else if (i<=1 && operator[i] == '=') {		//if there are less then 2 numbers in the array 
+		else if (i<=1 && operators[i] == '=') {		//if there are less then 2 numbers in the array 
 			result = numbers[i];					//set result to the 0 digit
 		}
 
-		else if (operator[i] == '=') {				//if char is = 
-			printf("The result is: %d", result);	//print out the result
+		else if (operators[i] == '=') {				//if char is = 
+			printf("The result is: %f", result);	//print out the result
 			i = 100; 
 			break;
 		}
diff --git a/src/main/c/main_taschenrechner.c b/src/main/c/main_taschenrechner.c
index f1fccac..02c981a 100644
--- a/src/main/c/main_taschenrechner.c
+++ b/src/main/c/main_taschenrechner.c
@@ -6,19 +6,19 @@
 #include "taschenrechner.h"
 
 
-doulbe add(doulbe a, doulbe b) {
+double add(double a, double b) {
     return a + b;
 }
 
-doulbe minus (doulbe a, doulbe b){
+double minus (double a, double b){
     return a - b;
 }
 
-doulbe multiply(doulbe a, doulbe b) {
+double multiply(double a, double b) {
     return a * b;
 }
 
-doulbe divide(doulbe a, doulbe b) {
+double divide(double a, double b) {
     if (b == 0) {
         return 0;
     }
diff --git a/src/main/c/taschenrechner.h b/src/main/c/taschenrechner.h
index 3855a6c..ffd85ad 100644
--- a/src/main/c/taschenrechner.h
+++ b/src/main/c/taschenrechner.h
@@ -2,22 +2,22 @@
 #define TASCHENRECHNER_H
 
 //add function
-doulbe add(doulbe a, doulbe b);
+double add(double a, double b);
 
 //minus function
-doulbe minus(doulbe a, doulbe b);
+double minus(double a, double b);
 
 //multiply function
-doulbe multiply(doulbe a, doulbe b);
+double multiply(double a, double b);
 
 //divide function
-doulbe divide(doulbe a, doulbe b);
+double divide(double a, double b);
 
 //get input and check if its a number
-double testForNumber()
+double testForNumber();
 
 //get input and check if its a operator
-char testForOperator()
+char testForOperator();
 
 // Square root function
 double squareRootFunction(double x);
diff --git a/src/main/c/testForOperator.c b/src/main/c/testForOperator.c
index 51b1931..0ad34c6 100644
--- a/src/main/c/testForOperator.c
+++ b/src/main/c/testForOperator.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <math.h>
+#include <stdbool.h>
 
 #include "taschenrechner.h"
 
@@ -9,7 +10,7 @@ char testForOperator() {
     //saving the number of operators in a variable so it only needs to be changed in one location
     int numberOfOperators = 5;
     //array where all valid Operators are saved, can be esily expanded
-    char oppArray[numberOfOperators] = { '+','-','*','/','=' };
+    char oppArray[] = { '+','-','*','/','=' };
     char input;
     bool validInput = false;
 
@@ -23,6 +24,6 @@ char testForOperator() {
             }
         }
         //if the input was deemed invalid it asks for new input and goes to the top of the while loop
-        printf("Diese Eigabe war nicht zulässig probieren sie es noch einmal!\n");
+        printf("The input was not allowed. Please try again!\n");
     }
 }
\ No newline at end of file