gcc not compiling

[Dotan Cohen <dotancohen gmail com>]

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