消息队列：先定义一个消息结构，包含消息类型和文本长度。在SERVER函数中，首先获得一个KEY为75的消息的描述符，然后利用do while循环来判断当消息类型为1的时候打印输出。在CLIENT函数中，先获得消息队列，然后利用for循环将消息类型从10赋值到1，发送队列，并打印输出。最后在main函数中调用这两个函数。-The message queue: define a message structure, contains the message type and the length of the text. In the SERVER function, first obtain a KEY 75 message descr iptor, and then use the do while cycle to determine when the message type is 1 when the print output. In the CLIENT function, to obtain the message queue, and then use the for loop will message type　10 assigned to 1, send queue, and print output. Finally, those two function calls in the main function.