Probably, but as you didn't check 'display this message as is', I can't really say. What are the names of the includes ? using namespace std is pretty much always a bad idea, but to get this sort of problem it's also likely you've included a non standard header like iostream.h and then elsewhere included the standard one ( iostream in this case ). Christian NO MATTER HOW MUCH BIG IS THE WORD SIZE ,THE DATA MUCT BE TRANSPORTED INTO THE CPU. - Vinod Sharma