package composite.four;
public class Main {
	public static void main(String[] args) {
		Expr onePtwo = ExprFactory.newPlus
				(ExprFactory.newConst(1), ExprFactory.newConst(2));

		ExprBuilder eb = ExprFactory.newMultBuilder();
		eb.add(ExprFactory.newConst(3));
		eb.add(ExprFactory.newConst(4));
		eb.add(onePtwo);
		Expr multiplies = eb.toExpr();
		Expr m = ExprFactory.newMinus (onePtwo, multiplies);

		System.out.println(m);
		System.out.println("Value: " + m.eval());
	}
}