SPOS - First Come First Served [FCFS] Program

import java.util.Scanner;

class fcfs{

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);

System.out.println("Enter The Number of Processes: ");

int n = sc.nextInt();

int i=0;

int [] at = new int [n];

int [] bt = new int [n];

int [] ct = new int [n];

int [] id = new int [n];

int [] tr = new int [n];

int [] wt = new int [n];

float avgwt = 0 , avgtr = 0;

while(i<n){

System.out.println("Enter arrival time for process: " + (i+1));

at[i] = sc.nextInt();

System.out.println("Enter the burst time: ");

bt[i] = sc.nextInt();

id[i] = i+1;

i++;

}

//calculating complete time

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

if(i==0){

ct[i] = at[i] + bt[i];

}

else{

if(at[i]> ct[i-1]){

ct[i] = at[i] - bt[i];

}

else{

ct[i] = ct[i-1] + bt[i];

}

}

tr[i] = ct[i] - at[i];

wt[i] = tr[i] - bt[i];

avgwt += wt[i];

avgtr += tr[i];

}System.out.println("\nID Arrival Burst Complete Turn Waiting ");

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

System.out.println(id[i] + "\t" + at[i] + "\t" + bt[i] + "\t" + ct[i] + "\t" + tr[i] + "\t" + wt[i] );

}

sc.close();

System.out.println("Average Waiting Time: " + avgwt);

System.out.println("Average Turn Around Time: "+ avgtr);

}

}