Count Sum of 3 Numbers Betwen (easy)

Get Number From User if Integer Then Display Number Otherwise Keep Asking to Enter Number(easy)

Count Number of Characters, Words and Lines From Input(work with ctype.h)

Sum of Integers Between Two Integers, Inclusive(work with functions)

Calculate Score if Grade Entered in a Form (from 0 to 9) and Return A to F(work with ctype.h and functions)