说明： 昨夜调度程序
1.按输入创建工作队列
2打印输入作业
3.先来先服务
4.按到达时间排序
5.按先来先服务进行相关计算 (last night for a scheduler. According to the importation of work to create Print Queue 2 3 importation operations. First-come first-serve 4. On arrival time Scheduling 5. according to first-come first-related computing services)
