一个操作系统的进程调度的实验。三种调度算法分别为 FCFS、优先级、时间片轮转。 其中优先级算法设置了三个级别的优先级。分别为0、1、2 。0为最高 2为最低。-An operating system process scheduling experiment. The three scheduling algorithm respectively FCFS, priority, time slice rotation. The priority algorithm set three levels of priority. 0,1,2, respectively. 0 is the highest 2 is the lowest.