priorty cpu schedulingalgo.c

             #include<stdio.h> 
                main()
    {            
             int p[20],bt[20],pri[20], wt[20],tat[20],i, k, n, temp;
            float wtavg, tatavg;
           clrscr();
            printf("Enter the number of processes --- ");
             scanf("%d",&n);
             for(i=0;i<n;i++) 
                 { 
                       p[i] = i;
                       printf("Enter the Burst Time & Priority of Process %d --- ",i);
                      scanf("%d %d",&bt[i], &pri[i]);
                  }
         for(i=0;i<n;i++) 
                 for(k=i+1;k<n;k++)
                       if(pri[i] > pri[k])
                    {
                         temp=p[i];  
                        p[i]=p[k];
                        p[k]=temp; 

                       temp=bt[i];
                      bt[i]=bt[k]; 
                      bt[k]=temp; 

                      temp=pri[i]; 
                     pri[i]=pri[k]; 
                     pri[k]=temp;
                   }
     wtavg = wt[0] = 0; 
     tatavg = tat[0] = bt[0];
     for(i=1;i<n;i++) 
          {
                    wt[i] = wt[i-1] + bt[i-1];
                     tat[i] = tat[i-1] + bt[i];
                    wtavg = wtavg + wt[i];
                    tatavg = tatavg + tat[i];
        }
printf("\nPROCESS\t\tPRIORITY\tBURST TIME\tWAITING TIME\tTURNAROUND TIME");
              for(i=0;i<n;i++)
                   printf("\n%d \t\t %d \t\t %d \t\t %d \t\t %d ",p[i],pri[i],bt[i],wt[i],tat[i]);
                   printf("\nAverage Waiting Time is --- %f",wtavg/n); 
                   printf("\nAverage Turnaround Time is --- %f",tatavg/n); 
getch();
 }