C progrma for First Come First Serve Algorithm

#include
#include
#include
void main()
{
      clrscr();
      int p[20],b[20],w[20],t[20],i,v,n,at;
      int wt=0;
      float tw,tr;
      printf("Enter the number of process : ");
      scanf("%d",&n);
      printf("enter CPU burst time : ");

      for(i=1;i<=n;i++)
       {
         scanf("%d",&b[i]);
         t[1]=b[1];
         w[1]=0;
         at=t[1];
         wt=w[1];
 for(i=2;i<=n;i++)
 {
   t[i]=b[i]+t[i-1];
   at=at+t[i];
   w[i]=t[i-1];
   wt=wt+w[i];
  }
       }
      printf("process \t burst_time \t wait_time \t turn_around \t \n");
      for(i=1;i<=n;i++)
      {
         printf("%d \t\t %d \t\t %d \t\t %d",i,b[i],w[i],t[i]);
         printf("\n");
      }
      printf("\n average wait time");
      tw=wt/n;
      printf("%f",tw);
      printf("\n Average turn around time");
      tr=at/n;
      printf("%f",tr);
      getch();
}