Write this program in c++ please.

Validate your program to NOT accept negative numbers. Remember to use the appropriate data type(s 2. Write a program that read a user inputted integer variable name cNum. It will print if cNum is odd o even, then, your program will perform the following computations and print the results: - If cNum is odd: 3n+1 - If cNum is even: n/2 This program MUST reject any inputs less than zero