Compile C

You might have to get clever to do this one.

Input

int main()
{
  char *s = "Hello, world!";
  int i, j;

  for (i = 0; s[i]; i++) {
    for (j = 0; j <= i; j++)
      putchar(s[j]);
    putchar('\n');
  }

  return 0;
}

Output

H
He
Hel
Hell
Hello
Hello,
Hello, 
Hello, w
Hello, wo
Hello, wor
Hello, worl
Hello, world
Hello, world!