lisp编的算术表达式中缀转后缀程序，递归。-lisp series of the arithmetic expressions grade switch suffix procedures, recursive.

计算器-逆波兰式，计算机计算中缀表达式时通常要将中缀转后缀，也就是逆波兰式-The calculator- Reverse Polish Notation, the computer calculation infix expression usually To infix turn suffix, which is the inverse Polish

这是用栈实现的运算式中缀转后缀与后缀转中缀的程序，里面详细标注了每个步骤。-This is achieved with a stack infix expressions turn suffix and suffix turn infix procedures, which detail marked each step.