编写程序完成单处理机系统中的进程调度，要求采用①先进先出；②优先数；③最短作业优先调度算法的进程调度。实验具体包括：首先确定进程控制块的内容，进程控制块的组成方式；然后完成进程创建原语和进程调度原语；最后编写主函数对所做工作进行测试。-Write a program to complete the process scheduling of single processor system, require the use of first in first out　(2) priority　(3) the shortest operation priority scheduling algorithm process scheduling. The specific include: determine the content of the process control block, the composition of process control block　Then complete the process to create the primitive and processes scheduling primitives　Finally write the main function testing work.