Please use simple code and lots of comments please!

1. Write a C/C++ function to determine if an integer X which is passed to the function is a prime number. If the integer X is a prime number, the function will return the true value; otherwise it will return the false value.

2. Write a program to read the integer X from the board and call the isPrime function with the integer x passed to function as a value parameter. If the function return value is true, the program will print the integer X is a prime number; otherwise print the integer X is not a prime number.