采用仿真实验的方法，分析和评价FCFS、SJF、RR和MLFS算法的优劣

场景设置：

-- 按长短作业不同比例

-- 按作业不同达到顺序

-- 按作业不同达到频率

-Method using simulation, analysis and evaluation of FCFS, SJF, RR, and MLFS merits of the algorithm set the scene:- in different proportions according to the length of operation- achieved by operating in different order- reached by operating in different frequency