If the character is an operator, pop two operands, perform the appropriate operation, and then push the result onto the stack.
如果字符是个操作符，弹出两个操作数，执行恰当操作，然后把结果压入堆栈。
If the character is an operator, pop two operands, perform the appropriate operation, and then push the result onto the stack.
如果字符是个操作符，弹出两个操作数，执行恰当操作，然后把结果压入堆栈。
应用推荐