Originally Posted by want_somehelp
Hoping for a good response...
Googling "factorial program in C++" or some such thing would lead to many prewritten programs if that is what you are looking for.

If you are wishing to write it yourself, good for you!
Have you written a program before in C++? In any other language?
Do you know what a factorial is?
Do you know what a "loop" is? A class? A variable? A method (function)?

Post what you have so far. If you have nothing yet, describe the problem.