Login, so whats the problem, tyo bhanum na, maybe it's something basic hehe... that I can help you out with... Like you know sometime you miss this, and that, and you just couldn't figure it out... like forgetting -lm while compiling program that used math library functions.. eheh.. basic stuff ke... :P Tyo code chai khaali echoes le bujhcha... natra we gotta find SM sainju.. :P da olTime Sajha C++ guru. :)