本程序是一个完整的后缀表达式计算，主要用栈的操作实现，本程序封装了CStack类实现栈的操作，本程序最大的特色在于运用动态监视表达式的算法对表达式进行数据校验，对一切合法的表达式进行计算，检验出所有任何非法表达式并提示-This program is a complete computing postfix expression, the main operations with the stack implementation, this program encapsulates CStack class implements the stack operation, the biggest feature of this program is to monitor the expression of algorithms using dynamic data validation on the expression , for all legitimate expressions calculated to test out all illegal expressions and prompts