Refactoring: optimize saving request

src/interestCalculator.c

@@ -27,25 +27,27 @@ void askForSavingGoal(float principalAmount, float accInterestPerYear){
     char c;
     float goal;
     float timeForGoal;
-    printf("\nWould you like to set a saving goal? [y] yes [any] no");
+
+    printf("\nWould you like to set a saving goal? [y/n]: ");
     scanf(" %c", &c);
 
-    if(c=='y'||c=='Y'){
+    if (c != 'y' && c != 'Y') {
+        return;
+    }
+
     printf("\nPlease enter your goal amount in €: ");
     scanf("%f", &goal);
-        if(goal>=principalAmount){
-            timeForGoal=(goal-principalAmount)/accInterestPerYear;
-            printf("\nIn %.1f years you will reach your goal of %f.\n", timeForGoal, goal);
-        }else{
+
+    if (goal < principalAmount) {
         troubleshoot(4);
         return;
     }
-    }else{
-        return;
-    }
 
+    timeForGoal = (goal - principalAmount) / accInterestPerYear;
+    printf("\nIn %.1f years you will reach your goal of %.2f.\n", timeForGoal, goal);
 }
 
+
 float initiateInterest(float principalAmount, float interest, float time){
     return principalAmount*(1+(interest*time));
 }