编写一进程调度程序模拟程序。进程状态为就绪、运行、阻塞三种。模拟程序只对你所设置的“虚拟PCB”进行相应的调度模拟操作，即每发生“调度”时，显示出当前运行的“PCB名字”、优先数、运行时间等，而不需要对系统中真正的PCB等数据进行修改。-prepare a process scheduler simulation program. Ready to process state, running, blocking three. Simulation program only right you have set up a "virtual PCB" accordingly scheduling simulation operation, that is, for every "Dispatch" shows that the current operation "PCB name" priority number, running time, without the need for a real system of PCB data changes.