refactoring: made an extra function(getIntegerInput) which helps read and print user value in a single step

src/main/c/programmingMode.c

@@ -5,6 +5,14 @@
 
 #include "taschenrechner.h"
 
+// get the NUmbers from the user
+int getIntegerInput(const char* prompt) {
+    int num;
+    printf("%s", prompt);
+    scanf("%d", &num);
+    return num;
+}
+
 // Calculation
 int performOperation(int num1, char operator, int num2) {
     switch (operator) {
@@ -31,14 +39,12 @@ void programmingMode() {
     int num1, num2, result;
     char operator;
 
-    printf("Enter first integer: ");
-    scanf("%d", &num1);
+    num1 = getIntegerInput("Enter first integer: ");
 
     printf("Enter operator (+, -, *, /): ");
     scanf(" %c", &operator);
 
-    printf("Enter second integer: ");
-    scanf("%d", &num2);
+    num2 = getIntegerInput("Enter second integer: ");
 
     // Calculation + Display the result