逆波兰式计算，将格式化数组转化为逆波兰表达式，a为输入的数组，n为其长度，p为输出逆波兰表达式的目标，m记录逆波兰表达式的长度 -inverse Polish, the array will be formatted into reverse Polish expression, a for the importation of arrays, its length n, p output of the inverse expression Poland, Poland inverse m re

C++实现的加减乘除四则运算计算器程序，包含生成逆波兰表达式算法-C++ achieve four Operational calculator arithmetic procedures, including generating reverse Polish notation algorithm