采用仿真实验的方法，分析和评价FCFS、SJF、RR和MLFS算法的优劣，用c++实现四种调度算法，源代码如下，思路程序内有注解-Method using simulation, analysis and evaluation of FCFS, SJF, RR, and MLFS merits of the algorithm, using c++ to achieve the four scheduling algorithms, source code is as follows, ideas, comments within the program