or.java

myassembler（大学作业）

public class Or extends Expression {
   private Expression firstOp, secondOp;
   
   public Or(Expression f, Expression s) {
      firstOp = (Expression)f.clone();
      secondOp = (Expression)s.clone();
   }
   
   public int eval() {
      return ((firstOp.eval()+secondOp.eval()>=1)?1:0);
   }
   
   public Object clone() {
      return new Or(firstOp, secondOp);
   }
   
   public String toString() {
      return firstOp.toString()+secondOp.toString()+labelling()+"OR\n";
   }
}