View Code of Problem 56

#include<stdio.h>

int main()
{
    int h1,h2,m1,m2,n1,n2,x,y,z,s;
    scanf("%d:%d:%d",&h1,&m1,&n1);
    scanf("%d:%d:%d",&h2,&m2,&n2);
    /*if(h2*3600 + m2 * 60 + n2 - h1 * 3600 - m1 * 60 - n1 > 0)
    {
        x = h2 - h1;
        y = m2 - m1;
        z = n2 - n1;
        if(y < 0)
        {
            y = y + 60;
            x--;
        }
        if(z < 0)
        {
            z = z + 60;
            y--;
        }
    }
    else
    {
        x = h1 - h2;
        y = m1 - m2;
        z = n1 - n2;
        if(y < 0)
        {
            y = y + 60;
            x--;
        }
        if(z < 0)
        {
            z = z + 60;
            y--;
        }

    }*/
    s = h2*3600 + m2 * 60 + n2 - h1 * 3600 - m1 * 60 - n1;
    if(s > 0)
    {
        x = s / 3600;
        y = (s % 3600) / 60;
        z = (s % 3600) % 60;
    }
    else
    {
        x = (-s) / 3600;
        y = ((-s) % 3600) / 60;
        z = ((-s) % 3600) % 60;
    }
    printf("%d:%02d:%02d",x,y,z);
    return 0;
}