Why this don't work at this app? :(

Question

https://code.sololearn.com/cA7zeG4tWbua/?ref=app

Answer 1

Nothing to do with the app - you just got a bunch of mistakes.

1.) write int main instead of void main.
2.) You have to take the input c at some point.
3.) Switch needs curly brackets {}.
4.) In the del case just write del instead of del(double).

Now deliver the input all in the beginning, and your code runs just fine.

Answer 2

Thanks, bro!

Answer 3

After you done the previous corection, you forget to put (cin >> c;), to allow users chose from the 4 option.