triangle

#include <iostream>

double Area(double dX0, double dY0, double dX1, double dY1, double dX2, double dY2)
{
    double dArea = ((dX1 - dX0)*(dY2 - dY0) - (dX2 - dX0)*(dY1 - dY0))/2.0;
    return (dArea > 0.0) ? dArea : -dArea;
}

void Center(Point tri){
 double centerX = (tri[0].x + tri[1].x + tri[2].x) / 3;
 double centerY = (tri[0].y + tri[1].y + tri[2].y) / 3;
}

int main()
{
    using namespace std;

    // Calculate the area for two triangles
    cout << "Area = " << Area(0.0, 0.0, 0.0, 1.0, 1.0, 1.0) << endl;
    cout << "Area = " << Area(1.0, 2.0, 3.0, 1.0, 4.0, 3.0) << endl;

    return 0;
}