From 0dce1641d1620b0eeac01e0867074cd41a0b216e Mon Sep 17 00:00:00 2001
From: fdlt3817 <can.hacioglu@lt.hs-fulda.de>
Date: Thu, 9 Feb 2023 19:23:26 +0100
Subject: [PATCH] Add troubleshoot system to help customers identify problems

---
 src/interestCalculator.c | 22 ++++++++++++++++++++++
 src/interestCalculator.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/src/interestCalculator.c b/src/interestCalculator.c
index b097ea4..a561d55 100644
--- a/src/interestCalculator.c
+++ b/src/interestCalculator.c
@@ -1,6 +1,22 @@
 #include "interestCalculator.h"
 
 
+void troubleshoot(int errorCode){
+    printf("Error! The requested operation was terminated because of an issue. Here are some details about the error:\n---------------\n");
+
+    switch(errorCode){
+        case 0:
+            printf("Principal amount not valid. Make sure it is a valid number over the value of zero.");
+            break;
+        case 1:
+            printf("Interest rate not valid. Make sure it is a valid number over the value of zero.");
+            break;
+        case 2:
+            printf("Duration not valid. Make sure it is a valid number over the value of zero.");
+            break;
+    }
+}
+
 void calculateYearlyInterest(){
     float principalAmount;
     float interestPerYear;
@@ -9,18 +25,21 @@ void calculateYearlyInterest(){
     printf("Please enter the principal amount:");
     scanf("%f",&principalAmount);
     if(principalAmount<=0){
+        troubleshoot(0);
         return;
     }
 
     printf("\nPlease enter interest per year (percentage):");
     scanf("%f",&interestPerYear);
     if(interestPerYear<=0){
+        troubleshoot(1);
         return;
     }
 
     printf("\nPlease enter interest time in years:");
     scanf("%f",&timeInYears);
     if(timeInYears<=0){
+        troubleshoot(2);
         return;
     }
 
@@ -37,18 +56,21 @@ void calculateMonthlyInterest(){
     printf("Please enter the principal amount:");
     scanf("%f",&principalAmount);
     if(principalAmount<=0){
+        troubleshoot(0);
         return;
     }
 
     printf("\nPlease enter interest per month (percentage):");
     scanf("%f",&interestPerMonth);
     if(interestPerMonth<=0){
+        troubleshoot(1);
         return;
     }
 
     printf("\nPlease enter interest time in months:");
     scanf("%f",&timeInMonths);
     if(timeInMonths<=0){
+        troubleshoot(2);
         return;
     }
 
diff --git a/src/interestCalculator.h b/src/interestCalculator.h
index 171dc12..fe0e593 100644
--- a/src/interestCalculator.h
+++ b/src/interestCalculator.h
@@ -5,4 +5,5 @@
 
 void calculateYearlyInterest();
 void calculateMonthlyInterest();
+void troubleshoot(int errorCode);
 #endif
\ No newline at end of file