public class Shapes {

	public final static double PI =   3.14159;

	// compute area of rectangle	
	public int areaRec(int length, int width){
		return length * width; 
	}

	// compute area of square
	public int areaRec(int width){
		return areaRec(width, width); 
	}


	public void doRectangularShapes(){
		// area of rectangle
		int area = areaRec(9,5);
		System.out.println("9 by 5 rectangle has area " + area);

		// area of square
		area = areaRec(12);
		System.out.println("square with width 12 has area " + area);
	}

	// compute area of ellipse
	public double areaEllipse(int major, int minor){
		return  major * minor * PI;
	}

	// compute area of circle
	public double areaEllipse(int radius){
		return areaEllipse(radius, radius);
	}

	public void doOvalShapes(){

		// area of ellipse 1
		System.out.println("major 9 by minor 5 ellipse has area " + areaEllipse(9,5));
		
		// area of circle
		System.out.println("circle with radius 12 has area " + areaEllipse(12));    	
	}

	public static void main(String[] args) {

		// TODO compute area and volume of some shapes

		// THIS IS WHAT WE WANT:
		//   1. methods with clear meaning
		//   2. main is simple and high level 
        
		Shapes shapes = new Shapes();
		
		shapes.doRectangularShapes();		 
		System.out.println();
		shapes.doOvalShapes();
	}

}