I'm just getting started in programming C. My first attempt: #include < stdio.h> void main () { printf("\nHello World!\n"); } Threw this error: [dotancohen@localhost ~]$ gcc hello.c hello.c:1:20: error: stdio.h: No such file or directory hello.c: In function 'main': hello.c:3: warning: incompatible implicit declaration of built-in function 'printf' hello.c:2: warning: return type of 'main' is not 'int' hello.c:4:2: warning: no newline at end of file So I googled for "1:20: error: stdio.h: No such file or directory" and found a post that suggests that the answer to the problem is found in the gcc manual. So I started reading it, but it is long and I'm not finding anything! I think that I'm missing a library stdio.h but I don't know where to find it, and where to put it once I do find it. Or am I completly wrong? The error message is pretty clear. Dotan Cohen http://technology-sleuth.com/question/how_can_i_be_safe_online.html