postfix
常见例句
- Read the postfix expression from left to right.
从左到右读入后缀表达式 - If you could not pop two operators, the syntax of the postfix expression was not correct.
如果您不能够弹出两个操作数，后缀表达式的语法就不正确。 - If the postfix expression was correctly formed, the stack should be empty.
若后缀表达式格式正确，那么堆栈应该为空。 返回 postfix