简单计算器，能够实现简单的加、减、乘、除。其原理就是使用了两个栈。一个符号栈，一个数据栈。-A simple calculator,it can able to achieve a simple add, subtract, multiply, divide. The principle is to use two stacks. A symbol stack, a data stack.

简单计算器，能够实现简单的加、减、乘、除。其原理就是使用了两个栈。一个符号栈，一个数据栈。-A simple calculator,it can able to achieve a simple add, subtract, multiply, divide. The principle is to use two stacks. A symbol stack, a data stack.