I Need to Help very Very Fast ( Help Me Please) of Factorial ?

[mghmgh]

I need to write a program that read of input a number N numbric & calculate N! that's number (should be simulator of multiply into program because us want number N )
& should be Number of character for e.g char s[20].

[Salem]

I think I'll just ignore you for 24 hours then.
http://www.catb.org/~esr/faqs/smart-questions.html#urgent

[n1337]

EDIT: deleted my explanations because I agree with Salem...also, could you try to be a little clearer with your question (I find it difficult to understand). And try some google searches...you can easily find an in-depth explanation of factorial, C++ i/o (reading from the console), etc...