C

int main(int argc, char* argv[])
{
// {
    if (argc < 3) {
        printf("\nUsage: %s hostname port.", argv[0]);
        return 1; //error
    }
    ...
// }
//    printf("Hello World!\n");
    return 0;
}

#define forloop(index, bound) for (int (index) = 0;(index) < (bound); (index)++)

forloop(i,n)
  forloop(j,n)
    forloop(k,n)
      // do something


참조 사이트:

http://kldp.org/node/105828
http://jjjryu.tistory.com/entry/%EC%BB%A8%ED%8A%B8%EB%A1%A4-Win32