It reminds me that, a few months ago, I wanted to write an "Hello world" program in C. It took me three compiles before executing it. The successive attempts were:

#include <stdlib.h>
#include <stdio.h>
void main ()
{
  printf "Hello world\n"
}
[download]

Oops, forgot that you need a semi-colon, even if followed by a closing brace.

#include <stdlib.h>
#include <stdio.h>
void main ()
{
  printf "Hello world\n";
}
[download]

What's wrong now? (time passes...) Ah yes, you need parentheses.

#include <stdlib.h>
#include <stdio.h>
void main ()
{
  printf("Hello world\n");
}
[download]

Yeah, it works!