//-----------------------------------------------------------------------
// Store this program in file program2.java. In the same directory, create
// another directory Geometry in which you store Point.java, Triangle.java.
// This forms the package Geometry. Note that in each of the
// files of directory Geometry we mention the line "package Geometry" to
// convey that the corresponding class is a part of the package Geometry.
// Compile and run this program with command line arguments.
//
// The files Point.java, Triangle.java are different from those posted on 
// lecture 22. In particular, we have rewritten the methods using "this"
// operator, introduced method Area() in Triangle.java. We also wrote methods 
// to access the attributes of Point and Triangle. Please go through these
// files carefully and try to write similar class for Circle.java and add it
// to package Geometry.
//------------------------------------------------------------------------
// Try to realize that the following program for computing area of 
// a triangle is now just a toy program. Just think how complex it would have 
// been if we had used structured programming aproach only. 
//-----------------------------------------------------------------------
import Geometry.Triangle;

class program2
{
    public static void main(String args[])
    {
	int x1 = Integer.parseInt(args[0]);
	int y1 = Integer.parseInt(args[1]);
	int x2 = Integer.parseInt(args[2]);
	int y2 = Integer.parseInt(args[3]);
	int x3 = Integer.parseInt(args[4]);
	int y3 = Integer.parseInt(args[5]);

	Triangle T = new Triangle(x1,y1,x2,y2,x3,y3);
	double area = T.Area();
	System.out.println("Area of triangle T is "+area);
    }
}