clock.c

#include<stdio.h>
#include<windows.h>
int main(void){
    int h,m,s,d=1000;
    printf("\n Set time (hr : min : sec) :\t ");
    scanf("%d%d%d",&h,&m,&s);
    if (h>12 || m>60 || s>60)
    {
        printf("\n******** ERROR ********\n");
        exit(0);
    }
    while (1)
    {
        s++;
        if (s>59)
        {
            m++;
            s=0;
        }
        if (m>59)
        {
            h++;
            m=0;
        }
        if (h>12)
        {
            h=1;
        }
        printf("\n CLOCK:");
        printf("\n %02d : %02d : %02d",h,m,s);
        Sleep(d);
        system("cls");
    }
    return 0;
}