计算器，通过用栈和队列的思想，进行简单的计算，识别能力完整对错误的输入会自动报错，其显示计算过程中，入栈出栈的详细过程-Calculator, by using stacks and queues of ideas, simple in calculation, the full recognition of the input the error will automatically error, its display in the calculation process, stack a