Determine which multiple of 3 the number is. For example, 33 is multiple 11 of 3.

Hi I need some help with my C++ code problem--Ask the user for a number between 3 and 99. Determine which multiple of 3 the number is. For example, 33 is multiple 11 of 3. If the number is not evenly divisible by 3, say so. You must write a function called MultipleNumber.