#include<stdio.h>
#include<unistd.h>
int main() {
pid_t pid;
pid = fork();
  if (pid<0) {
    fprintf(stderr, "Fork Failed");
    return 1;
  }
  else if (pid == 0) {
    printf(“Child (pid=%d) started \n”,pid);
    execlp("/bin/ps","ps",NULL);
  }
else {
printf("Parent (with child pid=%d) waiting for child to complete\n",pid); wait(NULL);
printf("Child Complete\n");
}
return 0; }