fcfs.c

#include <stdio.h>
void main()
{
     int n,i,j;
     double avg_wait=0,avg_tat=0;
     printf("Enter the number of processes: ");
     scanf("%d",&n);
     int btime[n],wtime[n],ttime[n];
     printf("Enter the burst time of the processes\n");
     for(i=0;i<n;i++)
     {
         printf("P%d Burst time: ",(i+1));
         scanf("%d",&btime[i]);
     }
     wtime[0]=0;
     for(i=0;i<n;i++)
     {
         wtime[i]=wtime[i-1]+btime[i-1];
         avg_wait=avg_wait+wtime[i];
     }
     avg_wait=avg_wait/n;
     for(i=0;i<n;i++)
     {
          ttime[i]=wtime[i]+btime[i];
          avg_tat=avg_tat+ttime[i];
     }
     avg_tat=avg_tat/n;
     printf("Process\tBurst time\tWait time\tTurn around time\n");
     for(i=0;i<n;i++)
     {
          printf("P%d\t%d\t\t%d\t\t%d\n",i+1,btime[i],wtime[i],ttime[i]);
     }
     printf("\n");
     printf("Average waiting time: %.2f\nAverage turn around time: %.2f\n",avg_wait,avg_tat);
     printf("\n");
     printf(" ");
     for(i=0;i<n;i++)
     {
          printf("--------");
     }
     printf("\n|");
     for(i=0;i<n;i++)
     {
          printf("P%d     |",i+1);
     }
     printf("\n|");
     for(i=0;i<n;i++)
     {
          printf("--------");
     }
     printf("\n0\t");
     int current_time=0;
     for(i=0;i<n;i++)
     {
          current_time=current_time+btime[i];
          printf("%d\t",current_time);
     }
     printf("\n");
}