public class AddExp extends Expression {

  private Expression e1;
  private Expression e2;

  public Expression getE1() { return e1; }
  public Expression getE2() { return e2; }
  
  public int eval() {
    return e1.eval() + e2.eval();
  }

  public void prettyPrint() {
    e1.prettyPrint();
    System.out.print(" + ");
    e2.prettyPrint();
  }

  public AddExp(Expression e1, Expression e2) {
    this.e1 = e1;
    this.e2 = e2;
  }

}