说明：  在采用多道程序设计的系统中，往往有若干个进程同时处于就绪状态。当就绪进程个数大于处理器数时,就必须依照某种策略来决定哪些进程优先占用处理器.本实验模拟在单处理器情况下的处理器调度,帮助学生加深了解处理器调度的工作.
(In a multi-channel programming system, often there are several processes simultaneously in the ready state. When ready to process the number is greater than the number of processors, it must follow a strategy to determine which process preempt the processor. The experimental simulation of single-processor case processor scheduling, processor scheduling to help students better understand the work.)