How to multiply two large integer number in C++?

Thank you for your answer, but , it didn't help me

Please have a look on this link

http://stackoverflow.com/questions/1971087/long-integer-multiplication

This answer wasn't what I have requested , I mean I want to multiply two large integer in indirect way not usual way.

You can refer this site:

http://www.cquestions.com/2010/08/multiplication-of-large-numbers-in-c.html

for your problem