说明：  这是linux下关于进程操作的两个例子,分别是"父子进程都写入文件"和"管道-两个子进程写父进程读".这两个程序对初学都理解linux下的多进程操作很有帮助.在linux GCC下编译通过.
(This is under linux operating on two examples of the process, namely the " father and son have been entered into the process of document" and " pipeline- the father of two sub-process in the process of writing time." These two procedures are learning to understand more the process of linux operating under very helpful. in the next linux GCC compiler through.)