在采用多道程序设计的系统中，往往有若干个进程同时处于就绪状态。当就绪进程个数大于处理器数时，就必须依照某种策略来决定哪些进程优先占用处理器。本程序模拟在单处理器情况下的处理器调度-In a multiprogramming systems, often have a number of process and in the state of readiness. When the number of processors in number than process, must according to some strategies to decide which process takes processor. This process simulation of single processor cases in the CPU scheduling