建立合理的PCB数据结构，建立含有8个进程结点的就绪队列，每个进程的要求运行时间随机产生，要求每个进程的要求运行时间不大于15。-PCB data to establish a rational structure, the establishment process nodes containing eight ready queue, the time required to run randomly generated each process, requiring the requirements of each process running time of less than 15.