Text string not appearing - RH problem?

I've just installed RH8 and tried a simple "hello world" program listed below. However, none of the text appears. The new lines show up, but no text. Not sure what I'm doing wrong.

#include<stdio.h>
int main() {
printf("\nhello world");
return;
}

I tried it on an old RH7.3 copy and it worked just fine. Using regular old gcc; tried KDE, full screen mode, etc.

it worked. however, why did it not automatically flush the buffer? do i have to manually do that even though it is such a simple program? thanks again for the help.