public class AddExp implements Expression {

	Expression left, right;
	
	public AddExp(Expression l, Expression r) {
		left = l;
		right = r;
	}
	
	@Override
	public int eval() {
		// TODO Auto-generated method stub
		return left.eval() + right.eval();
	}

	@Override
	public String show() {
		// TODO Auto-generated method stub
		return left.show() + " + " + right.show();
	}

	@Override
	public void traverse() {
		// TODO Auto-generated method stub
		System.out.println("+");
		left.traverse();
		right.traverse();
		System.out.println("+");
		
		
	}

}