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：-Program has achieved two producers and two consumers and producers of consumer issues (when the number of producers and consumers to add a few more