FCFS.c

#include<stdio.h>
void findWaitingTime(int processes[], int n, int bt[], int wt[])
{
    wt[0] = 0;
    for (int  i = 1; i < n ; i++ )
        wt[i] =  bt[i-1] + wt[i-1] ;
}
void findTurnAroundTime( int processes[], int n,int bt[], int wt[], int tat[])
{
    for (int  i = 0; i < n ; i++)
        tat[i] = bt[i] + wt[i];
}
   
void findavgTime( int processes[], int n, int bt[])
{
    int wt[n], tat[n], total_wt = 0, total_tat = 0;
   findWaitingTime(processes, n, bt, wt);
   findTurnAroundTime(processes, n, bt, wt, tat);
    printf("Processes   Burst time   Waiting time   Turn around time\n");
    for (int  i=0; i<n; i++)
    {
        total_wt = total_wt + wt[i];
        total_tat = total_tat + tat[i];
        printf("%d ",(i+1));
        printf("%d ", bt[i] );
        printf("%d ",wt[i] );
        printf("%d\n",tat[i] );
    }
    float s=(float)total_wt / (float)n;
    float t=(float)total_tat / (float)n;
    printf("Average waiting time = %f",s);
    printf("\n");
    printf("Average turn around time = %f ",t);
}
int main()
{
    int processes[] = { 1, 2, 3 , 4 , 5};
    int n = sizeof processes / sizeof processes[0];
    int  burst_time[] = {15, 9, 10, 17, 6};
   findavgTime(processes, n,  burst_time);
    return 0;
}