4 Responses to C program for Round Robin

1. Priyanka
   June 1st, 2010 at 6:17 pm

   // A program of round robin algorithm

   #include
   #include
   main ()
   {
   int p[10],wt[10], bt[10], tat[10], n, tq;
   int i, count = 0, twt = 0, ttat = 0, temp, sq = 0;
   float awt, atat;
   clrscr ();
   printf(“enter the no. of process=>”);
   scanf(“%d”,&n);
   printf(“\nenter process=>”);
   for(i=0;i”);
   for(i=0;i<n;i++)
   {
   scanf("%d",&bt[i]);
   p[i] = bt[i];
   }
   printf( "\n Enter time quantum : " );
   scanf ( "%d", &tq );
   while ( 1 )
   {
   for(i=0,count=0;itq )
   p[i]=p[i]-tq;
   else
   if( p[i] >= 0 )
   {
   temp = p[i];
   p[i] = 0;
   }
   sq=sq+temp;
   tat[i]=sq;
   }
   if (n==count)
   break;
   }
   for( i = 0; i < n; i++ )
   {
   wt [i] = tat[i] – bt[i];
   twt=twt+wt[i];
   ttat=ttat+tat[i];
   }
   awt =(float)twt/n;
   atat=(float)ttat/n;
   printf("p_no.\tP_bt\t p_wt\t p_tat\n" );
   for(i=0;i<n;i++)
   printf("%d\t%d\t%d\t%d\n",i+1,bt[i],wt[i],tat[i]);
   printf("total waiting time=%d\n avg waiting time=%f",twt,awt);
   printf("\ntotal turnedaroundtime=%d\n avg turnedaround time=%f",ttat, atat);
   getch();
   }

2. Eric
   October 12th, 2010 at 7:25 am

   Priyanka@: that program was already edited ?i mean it will run sir>

3. manish bagwari
   October 25th, 2010 at 7:18 pm

   sir this is static could u give me dynamic program for round robbin

4. Harshal
   February 20th, 2011 at 9:15 pm

   #include
   #include
   #include
   int t,n,s,bt[10],ct[10],ta[10],w[10],lat[10],wav,taav;
   int allover()
   {
   for(int i=0;i0)
   return 0;
   return 1;
   }
   void select(int p)
   {
   w[p]+=t-lat[p];
   if(ct[p]>=s)
   {
   ct[p]-=s;
   t+=s;
   }
   else
   {
   t+=ct[p];
   ct[p]=0;
   }
   if(ct[p]==0)
   ta[p]=t;
   lat[p]=t;
   }
   void main()
   {
   int p=0;t=0;taav=0;wav=0;
   clrscr();
   printf(“Enter the number of process : “);
   scanf(“%d”,&n);
   printf(“\n Enter the time slice : “);
   scanf(“%d”,&s);
   printf(“\nEnter the burst time of processes \n “);
   for(int i=0;i<n;i++)
   {
   printf("\n process %d : ",i+1);
   scanf("%d",&bt[i]);
   ct[i]=bt[i];
   lat[i]=0;
   }
   while(!allover())
   {
   if(ct[p]!=0)
   select(p);
   p=(p+1)%n;
   }
   printf("\n\n Process Burst time Wait time Turn around \n\n");
   for(i=0;i<n;i++)
   {
   printf("\n %d\t\t%d\t\t%d\t\t%d",i+1,bt[i],w[i],ta[i]);
   wav+=w[i];
   taav+=ta[i];
   }
   wav/=n;
   taav/=n;
   printf("\n\nAverage waiting time : %d ",wav);
   printf("\n\nAverage turn around time : %d ",taav);
   getch();
   }

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