srtf2.c

#include <stdio.h> //verified
#define Max 100

struct process
{
    int pid;
    int arrival_time;
    int burst_time;
    int remaining_time;
    int waiting_time;
    int turnaround_time;
};

int main(){
    int n;
    printf("Enter the number of processes:");
    scanf("%d", &n);

    struct process p[Max];

    for (int i = 0; i < n; i++){
        p[i].pid = i + 1;
        printf("Enter the arrival time and burst time for process %d:", i + 1);
        scanf("%d %d", &p[i].arrival_time, &p[i].burst_time);
        p[i].remaining_time = p[i].burst_time;
    }
    int t = 0;
    int completed = 0;

    while (completed < n){
        int shortest = -1;
        for (int i = 0; i < n; i++){
            if (p[i].arrival_time <= t && p[i].remaining_time > 0){
                if (shortest == -1 || p[i].remaining_time < p[shortest].remaining_time){
                    shortest = i;
                }
            }
        }
        if (shortest == -1){
            t++;
            continue;
        }
        p[shortest].remaining_time--;
        t++;

        if (p[shortest].remaining_time == 0){
            completed++;
            p[shortest].turnaround_time = t - p[shortest].arrival_time;
            p[shortest].waiting_time = p[shortest].turnaround_time - p[shortest].burst_time;
        }
      
    }
    float total_waiting_time = 0;
    float total_turnaround_time = 0;
    printf("\n|------------------------------Process Scheduling--------------------------------|");
    printf("\n|Process\t|Arrival Time\t|Burst Time\t|Turnaround Time |Waiting Time |\n");
    printf("|--------------------------------------------------------------------------------|");
    for (int i = 0; i < n; i++){
       printf("\n %d\t\t %d\t\t %d\t\t %d\t\t %d", p[i].pid, p[i].arrival_time, p[i].burst_time, p[i].turnaround_time, p[i].waiting_time);
        total_waiting_time += p[i].waiting_time;
        total_turnaround_time += p[i].turnaround_time;
    }
    printf("\n|--------------------------------------------------------------------------------|");
    printf("\nTotal Waiting Time: %.2f\n", total_waiting_time);
    printf("Total Turn Around Time: %.2f\n", total_turnaround_time);
    printf("Average Waiting Time: %.2f\n", total_waiting_time / n);
    printf("Average Turnaround Time: %.2f\n", total_turnaround_time / n);
}