SJF.c

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

                        temp=p[i]; 
                        p[i]=p[k];
                        p[k]=temp;
                  }
        wt[0] = wtavg = 0; 
        tat[0] = tatavg = 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("\n\t PROCESS \tBURST TIME \t WAITING TIME\t TURNAROUND TIME\n"); for(i=0;i<n;i++)
        printf("\n\t P%d \t\t %d \t\t %d \t\t %d", p[i], bt[i], wt[i], tat[i]);
       printf("\nAverage Waiting Time -- %f", wtavg/n);  
       printf("\nAverage Turnaround Time -- %f", tatavg/n);
  getch(); 
}