fcfs.c

#include <stdio.h>

void main()

{

int i,j,temp,n,at[25], bt[25], ct[25], tat[25],wt[25],sum=0;
float totWT=0, totTAT=0;

printf ("Enter the no: of processer: ");

scanf ("%d", &n);

for (i=0; i<n; i++)

{ 
printf ("\n Enter arrival time of process %d:", i); 
scanf ("%d",&at[i]); 
printf ("\n Enter burst time of process %d:",i);
scanf("%d",&bt[i]);

}

//CALCULATING COMPLETION TIME 
for (i=0; i<n; i++) 
{

 sum=sum+bt[i];
 ct[i]=sum;
}

//CALCULATING TURN AROUND TIME 
for (i=0; i<n; i++)

{ tat[i]=ct[i]-at[i]; 
 totTAT+=tat[i];
}
//| CALCULATING, WAITING TIME X3 
for (i=0; i<n; i++)
{
wt[i]=tat[i]-bt[i];
totWT+=wt[i]; 
}


printf ("\n TABLE");

printf ("\n----- ");

printf ("\n\n P.No\t AT\t BT\t CT\t TAT\t WT"); 
for (i=0; i<n; i++)
{
printf ("\n P%d\t %d\t %d\t %d\t %d\t%d",i,at[i],bt[i],ct[i],tat[i],wt[i]);

}

printf ("\n Average Turn around Time: %f", (totTAT/n)); 
printf ("\n Average waiting Time: %f \n", totWT/n);
}
//return 0;
//OUTPUT