1．设计一个有几个进程并发执行的进程调度程序，每个进程由一个进程控制块(PCB)表示，进程控制块通常应包括下述信息：进程名，进程优先数，进程需要运行的时间，占用CPU的时间以及进程的状态等，且可按照调度算法的不同而增删。

2．调度程序应包含2—3种不同的调度算法，运行时可以任选一种，以利于各种方法的分析和比较。

3．系统应能显示或打印各进程状态和参数的变化情况，便于观察。

-1.To design a process scheduler the concurrent execution of several processes, each process by a process control block (PCB) said process control block should normally include the following information: process name, process priority number, the process needs to run time, occupiedthe time of the CPU and the status of the process, etc., and may be different in accordance with the scheduling algorithm and deletions.

2. The scheduler should contain 2-3 different scheduling algorithms, the runtime can either facilitate analysis and comparison of the various methods.

3. The system should be able to display or print the process state and parameter changes, easy to observe.撤消修改

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