说明：  用C 语言实现对N个进程采用优先权优先算法的进程调度。通过优先权改变原则：1. 进程在就绪队列中等待一个片，优先权值加1 2 .进程每运行一个时间片，优先权值减3 实现对优先权的控制.
(N with a C language implementation of the priority of a process using the process of priority scheduling algorithm. By changing the principle of priority: 1. The process in the ready queue waiting for a film, the priority value plus 12. The process of running a time of each film, the priority value by 3 to achieve the priority control.)