/**
VectorTester.java   MrG 2012.0621
purpose:    manipulate 2D Vectors!
required files: VectorTester.java   main class
        Vector.java     derived class
translator: javac VectorTester.java
interpreter:    java VectorTester
*/
public class VectorTester
{
    public static void main(String[] args)
    {
        Vector a = new Vector(2,3);
        Vector b = new Vector(3,4);
        Vector c = a.sum(b);
        Vector d = a.diff(b);

        System.out.println("a = " + a);
        System.out.println("b = " + b);
        System.out.println("a+b = " + c);
        System.out.println("a-b = " + d);
        System.out.println("a*b = " + a.dot(b));
        System.out.println("a.abs() = " + a.abs());
        System.out.println("b.abs() = " + b.abs());
    }
}