Lightoj 1305 Area of a Parallelogram Solution

Problem Link:   https://lightoj.com/problem/area-of-a-parallelogram

 Solution in C++:

///La ilaha illellahu muhammadur rasulullah

///******Bismillahir-Rahmanir-Rahim******///

///Abul Hasnat  Tonmoy

///Department of CSE,23rd batch

///Islamic University,Bangladesh

///**********ALLAH IS ALMIGHTY************///

#include <bits/stdc++.h>

using namespace std;

int main()

{

    long long t, i,area,ax,ay,bx,by,cx,cy,dx,dy;;

    cin>>t;

    for (i=1; i<=t; i++)

    {

        cin>>ax>>ay>>bx>>by>>cx>>cy;

        dx= ax+cx-bx;

        dy = ay+cy-by;

        area=0.5*(((ax*by)+(bx*cy)+(cx*dy)+(dx*ay))-((ay*bx)+(by*cx)+(cy*dx)+(dy*ax)));

        if (area< 0)

            area*=-1;

        printf("Case %d: %d %d %d\n",i,dx,dy,area);

    }

    return 0;

}