OF is only an integer constant. On most systems it is -1. !-1 is false and while(false) won’t do anything.
What you want is to check the return values of scanf. scanf returns the number of successfully read items and eventually EOF.
OF is only an integer constant. On most systems it is -1. !-1 is false and while(false) won’t do anything.
What you want is to check the return values of scanf. scanf returns the number of successfully read items and eventually EOF.