本计算器可以进行简单的四则运算（加、减、乘、除）但仅限于十进制下，还可以进行（八进制，十进制，十六进制）之间的相互转换-This calculator can be a simple four operations (addition, subtraction, multiplication, in addition to the mutual conversion between) but only under the decimal (octal, decimal, hexadecimal)

实现一个简单的整数计算器，能够进行加、减、乘、除和乘方运算。使用时算式采用后缀输入-microsoft visual stdio