C program example to calculate difference between two time periods using structure

Write a C program to calculate difference between two time periods. (use structure variable to store time in hour, minute and second),C program mca exam 2013-2014 solve example with source code,

 Write a C program to calculate difference between two time periods. (use structure variable to store time in hour, minute and second)

#include 

struct TIME{

  int seconds;

  int minutes;

  int hours;

};

void Difference(struct TIME t1, struct TIME t2, struct TIME *diff);

int main(){

    struct TIME t1,t2,diff;

    printf("Enter start time: \n");

    printf("Enter hours, minutes and seconds respectively: ");

    scanf("%d%d%d",&t1.hours,&t1.minutes,&t1.seconds);

    printf("Enter stop time: \n");

    printf("Enter hours, minutes and seconds respectively: ");

    scanf("%d%d%d",&t2.hours,&t2.minutes,&t2.seconds);

    Difference(t1,t2,&diff);

    printf("\nTIME DIFFERENCE: %d:%d:%d - ",t1.hours,t1.minutes,t1.seconds);

    printf("%d:%d:%d ",t2.hours,t2.minutes,t2.seconds);

    printf("= %d:%d:%d\n",diff.hours,diff.minutes,diff.seconds);

    return 0;

}

void Difference(struct TIME t1, struct TIME t2, struct TIME *differ){

    if(t2.seconds>t1.seconds){

        --t1.minutes;

        t1.seconds+=60;

    }

    differ->seconds=t1.seconds-t2.seconds;

    if(t2.minutes>t1.minutes){

        --t1.hours;

        t1.minutes+=60;

    }

    differ->minutes=t1.minutes-t2.minutes;

    differ->hours=t1.hours-t2.hours;

}