说明：  类似一个可乐销售机系统，LabVIEW网络讲坛《状态机》(State Machine)下集里面用作例子
(Producer Consumer Example This particular example, a simulated soda machine, uses an event structure in the producer loop to register user input (depositingclicking on quarter, dime or nickel), and then pass that event on to the consumer loop for processing.)