Take away all those semi-colons after the if and else-if statement:


if (score >= 85);
grade = 'A';
else if (score >= 75);
grade = 'B';
else if (score >= 65);
...

Are you sure your program runs fine? At the first glance, there's so many errors in it:

1. Your main function is passing uninitialized variables' values like index and insertItem into removeAt()...

What's the difficulty in calculating these two items? The first one is straight from the value the user entered, the second was just the total revenue deducting the admin fee & prize money.


...