Updated header file to calculator.h

src/main/c/programmingMode.c

@@ -3,7 +3,7 @@
 #include <stdio.h>
 #include <math.h>
 
-#include "taschenrechner.h"
+#include "calculator.h"
 
 // get the NUmbers from the user
 int getIntegerInput(const char* prompt) {
@@ -52,4 +52,4 @@ void programmingMode() {
     // Calculation + Display the result
 
     printf("Result: %d\n", performOperation(num1, operator, num2));
-}
+}