ShapesThing.java
package shapes;

import shapes.SSquare;
import shapes.SCircle;

public class ShapesThing {
    public static void main(String[] args){
        SSquare square = new SSquare(400);
        System.out.println("square = " + square.toString());
        System.out.println("area of square = " + square.area());
        System.out.println("perimeter of square = " + square.perimeter());
        System.out.println("diagonal of square = " + square.diagonal());

        SCircle disk = square.inscribingCircle();
        System.out.println("disk = " + disk.toString());
        System.out.println("area of circle = " + disk.area());
        System.out.println("perimeter of circle = " + disk.perimeter());

        SSquare diamond = disk.inscribingSquare();
        System.out.println("diamond = " + diamond.toString());
        System.out.println("area of diamond = " + diamond.area());
    }
}