Create function to set saving goal

src/interestCalculator.c

@@ -20,6 +20,24 @@ void troubleshoot(int errorCode){
     }
 }
 
+void askForSavingGoal(float principalAmount, float accInterestPerYear){
+    char c;
+    float goal;
+    float timeForGoal;
+    printf("\nWould you like to set a saving goal?");
+    scanf(" %c",&c);
+    
+    if(c=='y'||c=='Y'){
+        printf("\nPlease enter your goal amount in €:");
+        scanf("%f",&goal);
+        timeForGoal=(goal-principalAmount)/accInterestPerYear;
+        printf("In %.1f years you will reach your goal of %f.\n", timeForGoal, goal);
+    }else{
+        //error
+    }
+
+}
+
 float initiateInterest(float principalAmount, float interest, float time){
     return principalAmount*(1+(interest*time));
 }
@@ -67,6 +85,7 @@ void calculateYearlyInterest(){
 
     float result= initiateInterest(principalAmount,interestDecimal,timeInYears);
     printf("\nAmount with the interest is %.2f€.",result);
+    askForSavingGoal(principalAmount,principalAmount*interestDecimal);
 }
 void calculateMonthlyInterest(){
     float principalAmount;
@@ -123,8 +142,8 @@ void initiateCalculator(){
     }
 }
 
-// int main(){
+int main(){
 
-//     initiateCalculator();
+    initiateCalculator();
 
-// }
+}

src/interestCalculator.h

@@ -5,6 +5,7 @@
 
 void calculateYearlyInterest();
 void calculateMonthlyInterest();
+void askForSavingGoal(float principalAmount, float accInterestPerYear);
 float initiateInterest(float principalAmount, float interest, float time);
 void troubleshoot(int errorCode);
 #endif