本程序的主要功能在于中缀表达式的计算,其中运算符有加,减,乘,除,乘幂基本运算符,,运算数为实数之间运算，并可以实现循环计算..完成基本操作是进行字符处理,栈的使用.

-The main function of this program is the infix expression evaluates operators add, subtract, multiply, in addition, the exponentiation operator, the operand is a real number between operations, and can calculate the cycle. Completed the basic operation The characters deal with the use of the stack.