FCFS

#include <stdio.h>
int main() {
    int n, total_waiting_time = 0, total_turnaround_time = 0;
    printf("Enter the number of processes: ");
    scanf("%d", &n);
    int arrival_time[n], burst_time[n], waiting_time[n], turnaround_time[n];
    for (int i = 0; i < n; i++) {
        printf("Enter arrival time and burst time for process %d: ", i + 1);
        scanf("%d %d", &arrival_time[i], &burst_time[i]);
    }
    printf("Process\tarrivaltime\tbursttime\tWaiting Time\tTurnaround Time\n");
    int current_time = 0;
    for (int i = 0; i < n; i++) {
        waiting_time[i] = current_time - arrival_time[i] < 0 ? 0 : current_time - arrival_time[i];
        turnaround_time[i] = waiting_time[i] + burst_time[i];
        total_waiting_time += waiting_time[i];
        total_turnaround_time += turnaround_time[i];
        printf("%d\t\t\t%d\t\t\t%d\t\t\t%d\t\t\t\t%d\n",arrival_time[i],burst_time[i], i + 1, waiting_time[i], turnaround_time[i]);
        current_time += burst_time[i];
    }
    printf("Average Waiting Time: %.2f\n", (float)total_waiting_time / n);
    printf("Average Turnaround Time: %.2f\n", (float)total_turnaround_time / n);
    return 0;
}