说明：  由一个进程创建三个子进程，三个子进程一个是生产者进程，两个是消费者进程，且要求：?父子进程都使用父进程创建的共享存储区进行通信，由生产者进程将一个数组中的十个数值发送到由5个缓冲区组成的共享内存中；? 两个消费者进程轮流接收并输出这十个数值，同时将两个消费者进程读出的数值进行累加求各和
(Three child processes are created by one process. One is a producer process, and two are consumer processes. The requirements are as follows: both the parent and child processes use the shared memory created by the parent process for communication, and the producer process sends ten values in an array to the shared memory composed of five buffers The two consumer processes receive and output the ten values in turn, and at the same time, the values read by the two consumer processes are accumulated for each sum)