一个操作系统的模拟多进程代码,可以任意输入进程名字,进程优先级别和进程的运行时间,然后程序会自动输出运行情况,直到结束-an operating system of multi-process simulation code can be indiscriminate importation process name, process and the priority level of the process of running time, and then the program will automatically output operation, until the end