(1)假定系统有5个进程，每个进程用一个PCB来代表。PCB的结构为：

• 进程名——如P1~P5。

• 指针——按优先数的大小把5个进程连成队列，用指针指出下一个进程PCB的首地址。

• 要求运行时间——假设进程需要运行的单位时间数。

• 优先数——赋予进程的优先数，调度时总是选取优先数大的进程先执行。

• 状态——假设两种状态：就绪和结束，用R表示就绪，用E表示结束。初始状态都为就绪状态。

(2) 开始运行之前，为每个进程确定它的“优先数”和“要求运行时间”。通过键盘输入这些参数。

(3) 处理器总是选择队首进程运行。采用动态改变优先数的办法，进程每运行1次，优先数减1，要求运行时间减1。

(4) 进程运行一次后，若要求运行时间不等于0，则将它加入就绪队列，否则，将状态改为“结束”，退出就绪队列。

(5) 若就绪队列为空，结束，否则转到(3)重复。

要求能接受键盘输入的进程优先数及要求运行时间，能显示每次进程调度的情况，如哪个进程在运行，哪些进程就绪，就绪进程的排列情况。

-( 1 ) The system has five processes, each represented by a PCB . PCB structure of:

      •　Process name- such as P1 ~ P5.

•　pointer- by size of the five priority number into程连成queue pointer pointed to the next process PCB first address .

      •　requirements for running time- assuming that the process needs to run the unit several times .

•　priority number- the number of priority given to the process , always select a large number of priority scheduling process executed first .

•　Status- assuming two states : Ready and end with R means ready to use E indicates the end . The initial state are ready state.

( 2 ) Before you start running , make sure it　s " priority number " and " run-time requirements " for each process . These parameters are entered through the keyboard .

( 3 ) the processor always choose the first team to run the process . Change the priority number of dynamic way to run a process every time , priority number