refactoring: Split scientificMode into two functions: scientificMode (for setup) and executeScientificFunction (handling switch case and result output). Also, isolated user's calculation choice into getNumberFromUser.

src/main/c/scientificMode.c

@@ -4,6 +4,14 @@
 #include <math.h>
 #include "taschenrechner.h"
 
+// get the number which has to be calculated
+double getNumberFromUser() {
+    double num;
+    printf("Enter a number: ");
+    scanf("%lf", &num);
+    return num;
+}
+
 // Choice for ScientificMode
 int getScientificModeChoice() {
     int choice;
@@ -103,22 +111,10 @@ void executeTrigonometricFunction(double num) {
 }
 
 
-int scientificMode(){
-
-    double num, result;
-
-    int choice;
-
-    do {
-        printf("Enter a number: ");
-        scanf("%lf", &num); // scan the number from the user
-
-        choice = getScientificModeChoice();
-
-        int logChoice, trigChoice;  // Move the initialization outside the loops
-
-        switch(choice) {
+void executeScientificFunction(double num, int choice) {
+    double result;
 
+    switch (choice) {
         case 1: // Square root
             result = squareRootFunction(num);
             printf("Result: %lf\n", result);
@@ -142,9 +138,19 @@ int scientificMode(){
 
         default:
             printf("Invalid choice. Please try again.\n");
-
     }
+}
+
 
+// scientificMode
+double scientificMode() {
+    double result;
+    int choice;
+
+    do {
+        double num = getNumberFromUser();
+        choice = getScientificModeChoice();
+        executeScientificFunction(num, choice);
     } while (choice != 0);
 
     return result;