English
- package com.company.section1;
- import java.util.HashMap;
- /**
- * @author cbf4Life cbf4life@126.com
- * I'm glad to share my knowledge with you all.
- */
- public abstract class SymbolExpression extends Expression {
- protected Expression left;
- protected Expression right;
- //所有的解析公式都应只关心自己左右两个表达式的结果
- public SymbolExpression(Expression _left,Expression _right){
- this.left = _left;
- this.right = _right;
- }
- }
