Operating system process scheduling algorithm
All five methods are included.
My short job priority is based on the time and short job comparison method to judge the execution.
# include <stdio.h>
# include <stdlib.h>
# include <string.h>
# include<iostream>
# include<queue>
# include<list>
#include <Windows.h>
using namespace std;
struct input{
int num;
char name;
double daoda;
double service;
}input[ ]={
{ 0, 'A', 0, 3 },
{ 1, 'B', 2, 6 },
{ 2, 'C', 4, 4 },
{ 3, 'D', 6, 5 },
{ 4, 'E', 8, 2 }
};
struct FCFS{
char name;
double wancheng;
double changetime;//平均周转时间
double powertime;//带权周转时间
}FCFS[6];
struct SJF{
char name;
double wancheng;
double changetime;//平均周转时间
double powertime;//带权周转时间
}SJF[6];
struct GXY{
char name;
double wancheng;
double changetime;//平均周转时间
double powertime;//带权周转时间
double zanshi;//存放暂时的优先权
}GXY[6];
struct RR{
char name;
double wancheng;
double changetime;//平均周转时间
double powertime;//带权周转时间
double ser;//存放任务经历的时间
}RR[6];
struct MFQ{
char name;
double wancheng;
double changetime;//平均周转时间
double powertime;//带权周转时间
double ser;
}MFQ[7];
//list<node>ListQ; //链表队列
char jincheng[6]={'A','B','C','D','E'};//进程名
int daoda[6]={0,2,4,6,8};//到达时间
int service[6]={3,6,4,5,2};//服务时间
int time[7];//到达时间排序之后的表
int duan[7];//按照作业长短排序
double FCFSchangetime=0;
double FCFSpowertime=0;
double SJFchangetime=0;
double SJFpowertime=0;
double GXYchangetime=0;
double GXYpowertime=0;
double RRchangetime=0;
double RRpowertime=0;
double MFQchangetime=0;
double MFQpowertime=0;
void shurujincheng();//1输入作业模拟情况；
void perform();//显示作业情况
void xianlaixianfuwu();//先来先服务
void performFCFS();//先来先服务算法输出时间
void paixutime();//按照到达时间排序
void duanzuoye();//短作业优先
void paixuwork();//按照作业服务时间排序
void performSJF();//输出短作业优先
void gaoxingying();//高响应比
void performGXY();//输出高响应比
void timeswitch();//时间片轮转
void performRR() ;//输出时间片轮转
void duojiMFQ();//多级反馈队列
void performMFQ();//输出多级反馈队列
int main()
{
int n = 1;
while( n!=0 )
{
printf("**************************\n") ;
printf("进程调度模拟程序：\n");
printf("1: 输入作业模拟情况\n");
printf("2: 显示作业情况\n");
printf("3: 先来先服务\n");
printf("4: 短作业优先算法\n");
printf("5: 高响应比优先算法\n");
printf("6: 时间片轮转算法\n");
printf("7: 多级反馈队列\n");
printf("8: 算法结果比较\n");
printf("0: 退出\n");
printf("请输入选择：\n");
printf("*****************************\n");
//printf("%d\n",n);
scanf("%d",&n);
switch(n)
{
case 1:
printf("\n*****************************\n");
shurujincheng();
perform();
printf("\n*****************************\n");
break;
case 2:
printf("\n*****************************\n");
perform();
printf("\n*****************************\n");
break;
case 3:
printf("\n*****************************\n");
xianlaixianfuwu();
perform();
performFCFS();
printf("\n*****************************\n");
break;
case 4:
printf("\n*****************************\n");
//duanzuoye();
duanzuoye();
perform();
performSJF();
printf("\n*****************************\n");
break;
case 5:
printf("\n*****************************\n");
gaoxingying();
perform();
performGXY();
printf("\n*****************************\n");
break;
case 6:
printf("\n*****************************\n");
timeswitch();
perform();
performRR();
printf("\n*****************************\n");
break;
case 7:
printf("\n*****************************\n");
duojiMFQ();
perform();
performMFQ();
printf("\n*****************************\n");
break;
case 8:
printf("\n*****************************\n");
perform();
printf("\n*****************************\n");
performFCFS();
printf("\n*****************************\n");
performSJF();
printf("\n*****************************\n");
performGXY();
printf("\n*****************************\n");
performRR();
printf("\n*****************************\n");
performMFQ();
printf("\n*****************************\n");
break;
case 0:
printf("\n*****************************\n");
n=0;
printf("\n*****************************\n");
break;
default :
printf("\n输入错误。请重新输入：\n");
continue;
}
}
}
void shurujincheng()
{
int n;
printf("输入5个作业：\n");
printf("\n输入进程信息(进程名,到达时间,服务时间)：\n");
for(int i=0;i<5;i++)
{
getchar();
printf("进程 %d :",i);
input[i].name=getchar();
printf("%c\n",input[i].name);
printf("到达时间：");
scanf("%lf",&input[i].daoda);
printf("服务时间：");
scanf("%lf",&input[i].service);
input[i].num=i;
}
return ;
}
void perform()
{
printf("进程名 ：");
for(int i=0;i<5;i++)
{
printf("%8c",input[i].name);
}
printf("\n");
printf("到达时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",input[i].daoda);
}
printf("\n");
printf("服务时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",input[i].service);
}
printf("\n");
return ;
}
void xianlaixianfuwu()//先来先服务
{
int daoda=0;//到达时间
int ser=0;//服务时间
daoda=input[time[0]].daoda+daoda;
paixutime();
for(int i=0 ; i<5 ; i++)
{
if(daoda >= input[time[i]].daoda)//到达时间总是小于服务时间
{
FCFS[time[i]].name=input[time[i]].name;
FCFS[time[i]].wancheng=input[time[i]].service+daoda;
FCFS[time[i]].changetime=FCFS[time[i]].wancheng-input[time[i]].daoda;
FCFS[time[i]].powertime=FCFS[time[i]].changetime/input[time[i]].service;
daoda=daoda+input[time[i]].service;
}
else
{
daoda=input[time[i]].daoda;
FCFS[time[i]].name=input[time[i]].name;
FCFS[time[i]].wancheng=input[time[i]].service+daoda;
FCFS[time[i]].changetime=FCFS[time[i]].wancheng-input[time[i]].daoda;
FCFS[time[i]].powertime=FCFS[time[i]].changetime/input[time[i]].service;
daoda=daoda+input[time[i]].service;
}
}
return ;
}
void performFCFS()
{
double sumchange=0;
double sumpower=0;
//printf("\n");
printf("完成时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",FCFS[i].wancheng);
}
printf("\n");
printf("周转时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",FCFS[i].changetime);
sumchange+=FCFS[i].changetime;
}
printf("\n");
printf("带全周转时间：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",FCFS[i].powertime);
sumpower+=FCFS[i].powertime;
}
printf("\n");
FCFSchangetime=sumchange/5;
FCFSpowertime=sumpower/5;
printf("平均周转时间\t\t带权周转时间\t\t\n");
printf("%8.2lf\t\t%8.2lf\t\t\n",FCFSchangetime,FCFSpowertime);
return ;
}
void duanzuoye()//短作业优先
{
paixutime();
paixuwork();
int daoda=0;//到达时间
//int ser=0;
int i=0,j=0;
int flag[7];
memset(flag,0,sizeof(flag));
if(input[time[i]].name!=input[duan[j]].name)
{
daoda+=input[time[i]].daoda;
SJF[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
SJF[time[i]].changetime=SJF[time[i]].wancheng-input[time[i]].daoda;
SJF[time[i]].powertime=SJF[time[i]].changetime/input[time[i]].service;
}
printf("%d\n ",daoda);
for(int k=1;k<5;k++)
{
j=0;
i=0;
while(flag[time[i]]==1)
{
i++;
}//保证每次比较的都是没有执行过的
while(flag[duan[j]]==1)
{
j++;
}//保证每次比较的都是没有执行过的
//printf("%c %c\n",input[time[i]].name,input[duan[j]].name);
if(daoda<input[time[i]].daoda && daoda<input[duan[j]].daoda)//保证2个都还没到达
{
//printf("1%c %c\n",input[time[i]].name,input[duan[j]].name);
if(flag[time[i]]==0)
{
if(input[time[i]].daoda < input[duan[i]].daoda)
{
daoda=daoda+input[time[i]].daoda;
SJF[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
SJF[time[i]].changetime=SJF[time[i]].wancheng-input[time[i]].daoda;
SJF[time[i]].powertime=SJF[time[i]].changetime/input[time[i]].service;
}
else
{
daoda+=input[duan[j]].daoda;
SJF[duan[j]].wancheng=daoda+input[duan[j]].service;
daoda+=input[duan[j]].service;
flag[duan[j]]=1;
SJF[duan[j]].changetime=SJF[duan[j]].wancheng-input[duan[j]].daoda;
SJF[duan[j]].powertime=SJF[duan[j]].changetime/input[duan[j]].service;
}
}
printf("%d \n ",daoda);
}
else if(input[time[i]].name==input[duan[j]].name && daoda>input[time[i]].name)//两个都到达了
{
// printf("2%c %c\n",input[time[i]].name,input[duan[j]].name);
if(input[time[i]].service < input[duan[j]].service)
{
//daoda=input[time[i]].daoda;
//printf("%d",daoda);
SJF[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
SJF[time[i]].changetime=SJF[time[i]].wancheng-input[time[i]].daoda;
SJF[time[i]].powertime=SJF[time[i]].changetime/input[time[i]].service;
}
else
{
//daoda=input[duan[j]].daoda;
//printf("%d\n ",daoda);
SJF[duan[j]].wancheng=daoda+input[duan[j]].service;
daoda+=input[duan[j]].service;
flag[duan[j]]=1;
SJF[duan[j]].changetime=SJF[duan[j]].wancheng-input[duan[j]].daoda;
SJF[duan[j]].powertime=SJF[duan[j]].changetime/input[duan[j]].service;
}
}
else if(input[time[i]].daoda <daoda && input[duan[j]].daoda>daoda)//两个都到达了，此时比较的是
{
//printf("3%c %c\n",input[time[i]].name,input[duan[j]].name);
//if(input[time[i]].service < input[duan[j]].service )
{
//daoda=input[time[i]].daoda;
//printf("%d\n",daoda);
//printf("%c\n",input[time[i]].name);
SJF[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
SJF[time[i]].changetime=SJF[time[i]].wancheng-input[time[i]].daoda;
SJF[time[i]].powertime=SJF[time[i]].changetime/input[time[i]].service;
}
}
else if(input[time[i]].daoda >daoda && input[duan[j]].daoda< daoda)
{
//printf("%d\n",daoda);
//printf("%c\n",input[duan[j]].name);
SJF[duan[j]].wancheng=daoda+input[duan[j]].service;
daoda+=input[duan[j]].service;
flag[duan[j]]=1;
SJF[duan[j]].changetime=SJF[duan[j]].wancheng-input[duan[j]].daoda;
SJF[duan[j]].powertime=SJF[duan[j]].changetime/input[duan[j]].service;
}
else
{
//printf("3%c %c\n",input[time[i]].name,input[duan[j]].name);
if(input[time[i]].service < input[duan[j]].service )
{
//daoda=input[time[i]].daoda;
//printf("%d\n",daoda);
//printf("%c\n",input[time[i]].name);
SJF[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
SJF[time[i]].changetime=SJF[time[i]].wancheng-input[time[i]].daoda;
SJF[time[i]].powertime=SJF[time[i]].changetime/input[time[i]].service;
}
else
{
//daoda=input[duan[j]].daoda;
//printf("%d\n",daoda);
//printf("%c\n",input[duan[j]].name);
SJF[duan[j]].wancheng=daoda+input[duan[j]].service;
daoda+=input[duan[j]].service;
flag[duan[j]]=1;
SJF[duan[j]].changetime=SJF[duan[j]].wancheng-input[duan[j]].daoda;
SJF[duan[j]].powertime=SJF[duan[j]].changetime/input[duan[j]].service;
}
}
}
return ;
}
void performSJF()
{
double sumchange=0;
double sumpower=0;
//printf("\n");
printf("完成时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",SJF[i].wancheng);
}
printf("\n");
printf("周转时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",SJF[i].changetime);
sumchange+=SJF[i].changetime;
}
printf("\n");
printf("带全周转时间：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",SJF[i].powertime);
sumpower+=SJF[i].powertime;
}
printf("\n");
SJFchangetime=sumchange/5;
SJFpowertime=sumpower/5;
printf("平均周转时间\t\t带权周转时间\t\t\n");
printf("%8.2lf\t\t%8.2lf\t\t\n",SJFchangetime,SJFpowertime);
return ;
}
void gaoxingying()
{
paixutime();
int flag[7];
int num[7];
int daoda=0;
memset(flag,0,sizeof(flag));
daoda+=input[time[0]].daoda;
GXY[time[0]].wancheng=daoda+input[time[0]].service;
daoda+=input[time[0]].service;
flag[time[0]]=1;
GXY[time[0]].changetime=GXY[time[0]].wancheng-input[time[0]].daoda;
GXY[time[0]].powertime=GXY[time[0]].changetime/input[time[0]].service;
int zanshi[7];
memset(zanshi,0,sizeof(zanshi));
int maxnum=0;
int max=0;
for(int i=1;i<5;i++)
{
if(daoda < input[time[i]].daoda)//还没到
{
printf("%c ",input[time[i]].name);
daoda=input[time[i]].daoda;
GXY[time[i]].wancheng=daoda+input[time[i]].service;
daoda+=input[time[i]].service;
flag[time[i]]=1;
GXY[time[i]].changetime=GXY[time[i]].wancheng-input[time[i]].daoda;
GXY[time[i]].powertime=GXY[time[i]].changetime/input[time[i]].service;
}
else//已经到了
{
for(int j=1;j<5;j++)//找到已经到了的 ,算出优先权存放起来
{
if(time[j]<daoda)
{
if(flag[time[j]]==0)
{
printf("%c ",input[time[j]].name);
//printf("%d \n",daoda);
//GXY[time[j]].wancheng=;
//daoda+=input[time[j]].service;
zanshi[time[j]]=1;
GXY[time[j]].zanshi=(daoda+input[time[j]].service-input[time[j]].daoda)/input[time[j]].service+1;
//GXY[time[j]].changetime=GXY[time[j]].wancheng-input[time[j]].daoda;
//GXY[time[j]].powertime=GXY[time[j]].changetime/input[time[j]].service;
}
}
}
for(int j=1;j<5;j++)
{
if(zanshi[time[j]]==1)
{
if(max<GXY[time[j]].zanshi)
{
max=GXY[time[j]].zanshi;
maxnum=time[j];
}
}
}
memset(zanshi,0,sizeof(zanshi));
//daoda=input[time[i]].daoda;
printf("%c ",input[maxnum].name);
printf("%d \n",daoda);
GXY[maxnum].wancheng=daoda+input[maxnum].service;
daoda+=input[maxnum].service;
flag[maxnum]=1;
GXY[maxnum].changetime=GXY[maxnum].wancheng-input[maxnum].daoda;
GXY[maxnum].powertime=GXY[maxnum].changetime/input[maxnum].service;
maxnum=0;
max=0;
}
}
return ;
}
void performGXY()
{
double sumchange=0;
double sumpower=0;
//printf("\n");
printf("完成时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",GXY[i].wancheng);
}
printf("\n");
printf("周转时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",GXY[i].changetime);
sumchange+=GXY[i].changetime;
}
printf("\n");
printf("带全周转时间：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",GXY[i].powertime);
sumpower+=GXY[i].powertime;
}
printf("\n");
GXYchangetime=sumchange/5;
GXYpowertime=sumpower/5;
printf("平均周转时间\t\t带权周转时间\t\t\n");
printf("%8.2lf\t\t%8.2lf\t\t\n",GXYchangetime,GXYpowertime);
return ;
}
void timeswitch()//时间片轮转
{
queue<int>q;
int daoda=0;
int num;
int zanshi=0;//存放没用完的时间片；
int z=0;
int flag[7];
memset(flag,0,sizeof(flag));
printf("输入时间片长度：\n");
scanf("%d",&num);
//printf("%d",num);
paixutime();
q.push(time[0]);
flag[0]=1;
for(int i=0;i<5;i++)
{
RR[i].changetime=0;
RR[i].wancheng=0;
RR[i].ser=0;
RR[i].powertime=0;
}
while(!q.empty())
{
//printf("q.size:%d \n",q.size());
//printf("daoda:%d zanshi:%d\n",daoda,zanshi);
daoda+=num;
for(int i=1;i<5;i++)
{
if(daoda>=input[time[i]].daoda &&flag[time[i]]==0)
{
q.push(input[time[i]].num);
flag[time[i]]=1;
//printf("进入队列:%c \n",input[time[i]].name);
}
}
if((RR[q.front()].ser+num) >= input[q.front()].service)//任务可以执行完
{
zanshi=num-(input[q.front()].service-RR[q.front()].ser);
//printf(" 任务完成:%c 到达时间:%d 剩余时间片:%d\n",input[q.front()].name,daoda,zanshi);
daoda=daoda-zanshi;
RR[q.front()].ser=input[q.front()].service;
RR[q.front()].wancheng=daoda;
RR[q.front()].changetime=RR[q.front()].wancheng-input[q.front()].daoda;
RR[q.front()].powertime=RR[q.front()].changetime/input[q.front()].service;
q.pop();
}
else //任务执行不完
{
RR[q.front()].ser+=num;
//printf("运行名字:%c 服务:%.2lf ",input[q.front()].name,RR[q.front()].ser);
//printf(" 任务未完成:%c 到达:%d \n",input[q.front()].name,daoda);
z=q.front();
q.push(z);
//printf("进入队列 %c \n",input[q.back()].name);
q.pop();
zanshi=0;
}
}
}
void performRR()
{
double sumchange=0;
double sumpower=0;
//printf("\n");
printf("完成时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",RR[i].wancheng);
}
printf("\n");
printf("周转时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",RR[i].changetime);
sumchange+=RR[i].changetime;
}
printf("\n");
printf("带全周转时间：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",RR[i].powertime);
sumpower+=RR[i].powertime;
}
printf("\n");
RRchangetime=sumchange/5;
RRpowertime=sumpower/5;
printf("平均周转时间\t\t带权周转时间\t\t\n");
printf("%8.2lf\t\t%8.2lf\t\t\n",RRchangetime,RRpowertime);
return ;
}
void duojiMFQ()//多级反馈队列
{
int daoda=0;
int num=0;
int zanshi=0;//存放没用完的时间片；
int z=0;
int flag[7],wan[7];//wan标记完成与否，flag标记进去没
memset(flag,0,sizeof(flag));
memset(flag,0,sizeof(wan));
paixutime();
//q.push(time[0]);
flag[0]=1;
printf("申请队列数：\n");
int n;
scanf("%d",&n);
queue<int>q[n];
q[0].push(time[0]);
int index=0;
for(int i=0;i<5;i++)
{
MFQ[i].changetime=0;
MFQ[i].wancheng=0;
MFQ[i].ser=0;
MFQ[i].powertime=0;
}
while(1)
{
for(int i=0;i<5;i++)//退出条件:所有的都执行了
{
if(wan[i]==1)
{
if(i==4)
{
printf("%d\n",i);
return ;
}
}
else
{
break;
}
}
num=index+1;
daoda+=num;//到达时间加运行时间
printf("daoda时间：%d 运行时间: %d\n",daoda,index+1);
for(int i=1;i<5;i++)//加入
{
if(daoda >= input[time[i]].daoda &&flag[time[i]]==0)
{
q[0].push(time[i]);
flag[time[i]]=1;
printf("进入队列的是 %c\n",input[time[i]].name);
}
}
if((MFQ[q[index].front()].ser+num) >= input[q[index].front()].service)//任务可以执行完
{
zanshi=num-(input[q[index].front()].service-MFQ[q[index].front()].ser);
printf(" 任务完成:%c 到达时间:%d \n",input[q[index].front()].name,daoda);
daoda=daoda-zanshi;
MFQ[q[index].front()].ser=input[q[index].front()].service;
MFQ[q[index].front()].wancheng=daoda;
MFQ[q[index].front()].changetime=MFQ[q[index].front()].wancheng-input[q[index].front()].daoda;
MFQ[q[index].front()].powertime=MFQ[q[index].front()].changetime/input[q[index].front()].service;
printf("完成时间：%d \n",MFQ[q[index].front()].wancheng);
wan[time[q[index].front()]]=1;
q[index].pop();
}
else //任务执行不完
{
MFQ[q[index].front()].ser+=num;
printf("运行名字:%c 服务:%.2lf ",input[q[index].front()].name,MFQ[q[index].front()].ser);
printf(" 任务未完成:%c 到达:%d \n",input[q[index].front()].name,daoda);
z=q[index].front();
if(index<(n-1))
{
q[index+1].push(z);
printf("%d %d \n",n-1,index+1);
}
else
{
q[index].push(z);
}
//printf("进入队列 %c 此时需转换队列 %d \n",input[q[index+1].back()].name,index+1);
q[index].pop();
zanshi=0;
}
for(int j=0; j<n;j++)
{
if(q[j].size()!=0)
{
index=j;
break;
}
/*if(q[index].size()!=0)
{
break;
}*/
}
}
return ;
}
void performMFQ()//输出多级反馈队列
{
double sumchange=0;
double sumpower=0;
//printf("\n");
printf("完成时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",MFQ[i].wancheng);
}
printf("\n");
printf("周转时间 ：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",MFQ[i].changetime);
sumchange+=MFQ[i].changetime;
}
printf("\n");
printf("带全周转时间：");
for(int i=0;i<5;i++)
{
printf("%8.2lf",MFQ[i].powertime);
sumpower+=MFQ[i].powertime;
}
printf("\n");
MFQchangetime=sumchange/5;
MFQpowertime=sumpower/5;
printf("平均周转时间\t\t带权周转时间\t\t\n");
printf("%8.2lf\t\t%8.2lf\t\t\n",MFQchangetime,MFQpowertime);
return ;
}
void paixutime()
{
int zanshi1[6];
int zanshi2[6];
int num;
for(int i=0;i<5;i++)
{
zanshi1[i]=input[i].daoda;
zanshi2[i]=input[i].num;
}
for(int i=0;i<5;i++)
{
for(int j=i+1;j<5;j++)
{
if(zanshi1[i]>zanshi1[j])
{
num=zanshi2[i];
zanshi2[i]=zanshi2[j];
zanshi2[j]=num;
num=zanshi1[i];
zanshi1[i]=zanshi1[j];
zanshi1[j]=num;
}
}
}
for(int i=0;i<5;i++)
{
time[i]=zanshi2[i];
printf("%d ",time[i]);
}//排序，按照到达时间长短
printf("\n");
}
void paixuwork()
{
int zanshi1[6];
int zanshi2[6];
int num;
for(int i=0;i<5;i++)
{
zanshi1[i]=input[i].service;
zanshi2[i]=input[i].num;
}
for(int i=0;i<5;i++)
{
for(int j=i+1;j<5;j++)
{
if(zanshi1[i]>zanshi1[j])
{
num=zanshi2[i];
zanshi2[i]=zanshi2[j];
zanshi2[j]=num;
num=zanshi1[i];
zanshi1[i]=zanshi1[j];
zanshi1[j]=num;
}
}
}
for(int i=0;i<5;i++)
{
duan[i]=zanshi2[i];
printf("%d ",duan[i]);
}//排序，按照到达时间长短
printf("\n");
return ;
}
Operation results The
experimental input needs to perform steps 3, 4, 5, 6, and 7 before it can execute 2, and displays all the operating conditions
Input data condition
Input data condition
execution first come first serve 
execution short job priority
Execution of high response ratio takes priority. The
blue part is the test in the process that can be deleted later.
Time slice rotation
multi-level feedback queue, the process can log off
Multi-level feedback queue All process final results output 
All process final results output
