roundrobin

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2 months ago
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#include<stdio.h>
struct process{
int pid;
int at;
int bt;
int rt;
int ct;
int tat;
int wt;
}process;

 void main()
  {
   int n,t;
   printf("ENTER NO OF PROCESSES");
   scanf("%d",&n);
   printf("ENTER THE TIME QUANTUM");
   scanf("%d",&t);
   struct process a[n];
   printf("ENTER ARRIVAL TIME & BURST TIME OF");
   for(int i=1;i<=n;i++)
    {
     printf("PROCESS %d",i);
     a[i].pid=i;
     scanf("%d%d",&a[i].at,&a[i].bt);
     a[i].rt=a[i].bt;
    }
roundrobin(a,n,t);
display(a,n);
    }

void roundrobin(struct process a[],int n,int t) 
{
int rp=n;
int time=0;
 while (rp>0)
 {
  for(int i=0;i<n;i++)
  {
   if(a[i].rt>0)
   {
    int execute_time=a[i].rt;
    if(a[i].rt<t){
    execute_time=a[i].rt;
   }
   time+=execute_time;
   a[i].rt=execute_time;
   if(a[i].rt==0)
   {
    rp--;
    a[i].ct=time;
    a[i].tat=a[i].ct-a[i].at;
    a[i].wt=a[i].tat-a[i].bt;  
     }
    } 
  }
 } 
}

void display(struct process a[],int n){
float avg_tat=0;
float avg_wt=0;
printf("PID |\tAT |\tBT |\tCT |\tTAT |\tWT |");
 for(int i=0;i<n;i++)
 {
  printf("%d/t,%d/t,%d/t,%d/t,%d/t,%d/t \n");
  avg_tat+=a[i].tat;
  avg_wt+=a[i].wt;
  }
  avg_tat=avg_tat/n;
  avg_wt=avg_wt/n;
printf("\nAVG_TAT=%f",avg_tat);
printf("\nAVG_wT=%f",avg_wt);
}
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