自行编制模拟程序，通过形象化的状态显示，加深理解进程的概念、进程之间的状态转换及其所带来的PCB内容 、组织的变化，理解进程与其PCB间的一一对应关系-Self compiled simulation program, through the vivid display, deepen the understanding process of the concept, process between state transitions and the PCB content, organizat