超级多项式计算器，什么都能算哦！包括字母多项式，括号，乘方都行的～-super-polynomial calculators, and what can count! Including letters polynomial, in brackets, involution are OK ~

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功能超级强大的计算器。。。支持表达式运算。具有中缀转后缀功能。。。。。使用了数据结构中先进的技术，是不可多的的代码，本人就读南京大学时的作品 -Function super powerful calculator. . . Expressions are supported. With infix to suffix function. . . . . The use of advanced technology in the data structure is not much of th