程序实现了两个生产者和两个消费者的生产者消费者问题（当生产者消费者数目再多时加上几个子进程就可以了）为了防止程序陷入死循环，给生产者限定了生产次数，同时为了方便截图，将次数限定的比较少。下面是我的程序：-Procedures to achieve the two producers and two consumers and producers of consumer issues (when the number of producers of consumers to add a few more hours can be a sub-process) in order to prevent the program into a death cycle, to limit the production of the number of producers At the same time, for the convenience of shots, will be a limited number of relatively small. The following is my procedure: