OS13

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main() {
pid_t child_pid = fork();
if (child_pid == 0) {
printf("Child process (PID %d) is running.\n", getpid());
sleep(100);
printf("Child process (PID %d) is done.\n", getpid());
} else if (child_pid > 0) {
printf("Parent process (PID %d) is running.\n", getpid());
printf("Parent process (PID %d) is done.\n", getpid());
} else {
perror("Fork failed");
return 1;}
return 0;

#2
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
typedef struct { int a, b, t, w; } P;
int main() {
int n, io = 2, t = 0; srand(time(0));
printf("Enter n: "); scanf("%d", &n);
P p[n]; for (int i = 0; i < n; i++) {
p[i].a = i; printf("Arrival time for P%d: ", i + 1);
scanf("%d", &p[i].t); printf("Burst time for P%d: ", i + 1);
scanf("%d", &p[i].w);}
for (int i = 0; i < n; i++) {
for (int j = i + 1; j < n; j++) {
if (p[i].t > p[j].t) {
P temp = p[i]; p[i] = p[j]; p[j] = temp;}}}
printf("Gantt Chart:\n");
for (int i = 0; i < n; i++) {
printf("P%d ", p[i].a + 1);
t += p[i].w;
p[i].w = t - p[i].t;
p[i].t = p[i].w + p[i].w;}
printf("\nTurnaround Time\tWaiting Time\n");
for (int i = 0; i < n; i++) {
printf("P%d\t%d\t\t%d\n", p[i].a + 1, p[i].t, p[i].w);}
return 0;