操作系统实验 四种调度算法.doc

调度算法实验计算机科学与技术学院计0810813022026 高宁实验目的：1. 掌握进程控制块的概念，理解基本的进程调度算法。实验内容:1. FCFS2. 短作业优先算法3. 优先级调度算法4最高响应比调度算法实验源程序：#include #include #include using namespace std;class JOB /定义作业数据结构体public:int number; /作业个数int reach_time; /作业到达时间int reach_hour; int reach_minite; int need_time; /作业运行时间int privilege; /优先级float excellent; int start_time; /开始时间int wait_time; /等待时间int visited; /已读取次数public:JOB()number=0;reach_time=0;reach_hour=0;reach_minite=0;need_time=0;privilege=0;excellent=0.0;start_time=0;wait_time=0;visited=0;JOB& Copy(JOB js)int i=0;while(jsi.number&jsi.number0)i+;JOB *js2=new JOBi;for(int j=0;jCopy (job);int current_hour; int current_minute; int total_time=0; /输出作业流 coutendl; coutendlFIFO调度算法：endl; cout.setf(2); coutsetw(10)作业号：setw(12)到达时间：setw(12)开始时间：setw(14)周转时间(分)：endl; current_hour=jobs0.reach_hour; current_minute=jobs0.reach_minite; for(int i=0;iquantity;i+) jobsi.start_time=current_hour*100+current_minute; jobsi.wait_time=(current_hour-jobsi.reach_hour)*60+(current_minute-jobsi.reach_minite)+jobsi .need_time; coutsetw(10)jobsi.numbersetw(12)jobsi.reach_timesetw(12)jobsi.start_timesetw(14)jobsi.wait_timeendl; current_hour=current_hour+(jobsi.need_time+current_minute)/60; current_minute=(jobsi.need_time+current_minute)%60; total_time+=jobsi.wait_time; coutendl总周转时间:total_time 平均周转时间:total_time/quantityCopy (job);int i,j,p; int current_hour; int current_minute; int current_need_time; int total_time=0; /输出作业流 coutendl; coutendl时间短作业优先算法:endl; cout.setf(2); coutsetw(10)作业号:setw(12)到达时间:setw(14)所需时间(分):setw(12)开始时间:setw(14)周转时间(分):endl; current_hour=jobsquantity-1.reach_hour; current_minute=jobsquantity-1.reach_minite; for(i=0;iquantity;i+) current_need_time=30000; for(j=0;jquantity;j+) if(jobsj.visited=0)&(jobsj.need_timecurrent_need_time) p=j; current_need_time=jobsj.need_time; jobsp.start_time=current_hour*100+current_minute; jobsp.wait_time=(current_hour-jobsp.reach_hour)*60+(current_minute-jobsp.reach_minite)+jobsp .need_time; coutsetw(10)jobsp.numbersetw(12)jobsp.reach_timesetw(14)jobsp.need_timesetw(12)jobsp.start_timesetw(14)jobsp.wait_timeendl; current_hour=current_hour+(jobsp.need_time+current_minute)/60; current_minute=(jobsp.need_time+current_minute)%60; jobsp.visited=1; total_time+=jobsp.wait_time; coutendl总周转时间:total_time 平均周转时间:total_time/quantityCopy (job);int i,j,p; int current_hour; int current_minute; int current_privilege; int total_time=0; /输出作业流 coutendl; coutendl优先数调度算法:endl; cout.setf(2); coutsetw(10)作业号:setw(12)到达时间:setw(14)1):setw(12)开始时间:setw(14)周转时间(分):endl; current_hour=jobsquantity-1.reach_hour; current_minute=jobsquantity-1.reach_minite; for(i=0;iquantity;i+) current_privilege=30000; for(j=0;jquantity;j+) if(jobsj.visited=0)&(jobsj.privilegecurrent_privilege) p=j; current_privilege=jobsj.privilege; jobsp.start_time=current_hour*100+current_minute; jobsp.wait_time=(current_hour-jobsp.reach_hour)*60+(current_minute-jobsp.reach_minite)+jobsp .need_time; coutsetw(10)jobsp.numbersetw(12)jobsp.reach_timesetw(14)jobsp.privilegesetw(12)jobsp.start_timesetw(14)jobsp.wait_timeendl; current_hour=current_hour+(jobsp.need_time+current_minute)/60; current_minute=(jobsp.need_time+current_minute)%60; jobsp.visited=1; total_time+=jobsp.wait_time; coutendl总周转时间:total_time 平均周转时间:total_time/quantityCopy (job);int i,j,p; int current_hour; int current_minute; float current_excellent; int total_time=0; /输出作业流 coutendl; coutendl响应比高者优先调度算法:endl; cout.setf(2); coutsetw(10)作业号setw(12)到达时间setw(12)开始时间setw(14)周转时间(分)endl; current_hour=jobsquantity-1.reach_hour; current_minute=jobsquantity-1.reach_minite; for(i=0;iquantity;i+) current_excellent=-1; for(j=0;jquantity;j+) if(jobsj.visited=0) jobsj.wait_time=(current_hour-jobsj.reach_hour)*60+(current_minute-jobsj.reach_minite); jobsj.excellent=(float)(jobsj.wait_time/jobsj.need_time); for(j=0;jcurrent_excellent) p=j; current_excellent=jobsj.excellent; jobsp.start_time=current_hour*100+current_minute; jobsp.wait_time=(current_hour-jobsp.reach_hour)*60+(current_minute-jobsp.reach_minite)+jobsp .need_time; coutsetw(10)jobsp.numbersetw(12)jobsp.reach_timesetw(12)jobsp.start_timesetw(14)jobsp.wait_timeendl; current_hour=current_hour+(jobsp.need_time+current_minute)/60; current_minute=(jobsp.need_time+current_minute)%60; jobsp.visited=1; total_time+=jobsp.wait_time; coutendl总周转时间:total_time 平均周转时间:total_time/quantityendl; int main(void) cout*调度模拟*nnnendl;int quantity=0; /数量JOB jobsMAXJOB; coutfname; fp=fopen(fname,r);/以只读方式打开文件if(!fp) cout打开文件错误！)endl; elsewhile(!feof(fp) fscanf(fp,%d %d %d %d,&jobsquantity.number,&jobsquantity.reach_time,&jobsquantity.need_time,&jobsquantity.privilege);jobsquantity.reach_hour=jobsquantity.reach_time/100; jobsquantity.reach_minite=jobsquantity.reach_time%100; quantity+; /输出初始作业数据 cout初始作业数据：endl; cout.setf(2); coutsetw(10)作业号：setw(12)到达时间：setw(14)所需时间(分)：setw(14)1)endl; for(int i=0;iquantity;i+) coutsetw(10)jobsi.numbersetw(12)jobsi.reach_timesetw(14)jobsi.need_timesetw(14)jobsi.privilegeendl; lb:cout请选择调度算法:n;couttt1-先进先出调度算法n;couttt2-短作业优先n;couttt3-优先级调度算法n;couttt4-响应比最高调度算法flag;switch (flag)case 1:FIFO(jobs,quantity); break;/先进先出调度算法case 2:Shorter(jobs,quantity);break;/短作业优先case 3:Privilege(jobs,quantity);break; /优先级调度算法case 4:Excellent(jobs,quantity);break; /响应比最高调度算法default:cout请输入1-4之间的数endl;goto lb;goto la;return 0;数据文件：data.txt1 700 40 12 723 32 23 821 25 34 823 21 45 900 15 66 912 10 47 930 51 5总结及程序简介：1 首先将数据存在data.t