FCFS_CPU.c

#include<stdio.h>
main() { int bt[20], wt[20], tat[20], i, n;
float wtavg, tatavg;

printf("\nEnter the number of processes -- ");
scanf("%d", &n);

for(i=0;i<n;i++)
{
    printf("\nEnter Burst Time for Process %d -- ", i);
    scanf("%d", &bt[i]);
}
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("\t PROCESS \tBURST TIME \t WAITING TIME\t TURNAROUND\t TIME\n");
for(i=0;i<n;i++)
    printf("\n\t P%d \t\t %d \t\t %d \t\t %d", i, bt[i], wt[i], tat[i]);
printf("\nAverage Waiting Time -- %f", wtavg/n);
printf("\nAverage Turnaround Time -- %f", tatavg/n);
}