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round robin scheduling
54 lines (51 loc) · 1.3 KB
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round robin scheduling
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#include<stdio.h>
int main()
{
int count,j,n,time,remain,flag=0,time_quantum;
int wait_time=0,turnaround_time=0,at[10],bt[10],rt[10];
printf("enter no of process:\t ");
scanf("%d",&n);
remain=n;
for(count=0;count<n;count++)
{
printf("enter arrival time %d :",count+1);
scanf("%d",&at[count]);
printf("enter Burst Time %d :",count+1);
scanf("%d",&bt[count]);
rt[count]=bt[count];
}
printf("enter time quantum:\t");
scanf("%d",&time_quantum);
printf("\n\nprocess\t|turnaround Time|waiting time\n\n");
for(time=0,count=0;remain!=0;)
{
if(rt[count]<=time_quantum && rt[count]>0)
{
time+=rt[count];
rt[count]=0;
flag=1;
}
else if(rt[count]>0)
{
rt[count]-=time_quantum;
time+=time_quantum;
}
if(rt[count]==0 && flag==1)
{
remain--;
printf("P[%d]\t|\t%d\t|\t%d\n",count+1,time-at[count],time-at[count]-bt[count]);
wait_time+=time-at[count]-bt[count];
turnaround_time+=time-at[count];
flag=0;
}
if(count==n-1)
count=0;
else if(at[count+1]<=time)
count++;
else
count=0;
}
printf("\naverage Waiting Time= %f\n",wait_time*1.0/n);
printf("Avg Turnaround Time = %f",turnaround_time*1.0/n);
return 0;
}