WAP to Implement a Digital Clock in C - 42

This Program implements a Digital Clock in C

Program Code:

/*  Program to implement a digital clock  */

#include <stdio.h>
#include <time.h>
int main() 
{
        time_t ts, flag = 1;
        struct tm *ct;
        system("clear");
        printf("\n\n\t Digital Clock  -  CodeGig.org \n\t  ");

        /* digital clock implementation */
        while (1) 
 {
                /* time() - gives time in seconds */
                ts = time(NULL);

                /* converting time(NULL) o/p to min, sec, hours */
                ct = localtime(&ts);

                /* print the digital clock */
                if (flag || ct->tm_min % 59 == 0) {
                        if (!flag)
                                printf("\b\b\b\b\b\b");
                        printf("%02d:%02d:%02d",
                                ct->tm_hour, ct->tm_min, ct->tm_sec);
                        flag = 0;
                        printf("\b\b");
                        continue;
                }

                if (ct->tm_sec % 59 == 0) {
                        printf("\b\b\b");
                        printf("%02d:", ct->tm_min);
                }

                printf("%02d", ct->tm_sec);
                printf("\b\b");
        }
        return 0;
}

Program Output: