Simple C clock DevC++-friendly

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <time.h>

int main()
{
// Hours, minutes and seconds
int hh;
int mm;
int ss;

// Rise and shine, Mr. Clock
hh = 0;
mm = 0;
ss = 0;

// A clock always works
while (1) {
        while(hh < 24)  {
        while(mm < 60)  {
            while(ss < 60)  {
            sleep(1);
            ss++;

            // What time is it?
            printf("%d : %d : %d \t\t Close with Ctrl+C \r", hh, mm, ss);
            }
        mm++;
        ss = 0;
        }
        hh++;
        mm = 0;
        }
    hh = 0;
}

}