this the lab that shows how to convert the infix number to postfix and also calculate them-this is the lab that shows how to convert the infix number to postfix and also calculate them

最简单的计算器，可以计算+，-，*，/以及括号的优先级，采用后缀表达式的方式。-Simple calculator, you can calculate the+,-,*, /, and parentheses priority postfix expression.