#include <stdio.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

int main(void)
{
    printf("Parent: Process started.\n");
    printf("Parent: Forking a child.\n");
    
    pid_t pid = fork();
    if (pid != 0)
    {
        // Parent
        int status;
        printf("Parent: Waiting for child with pid %d to complete ...\n", pid);
        waitpid(pid, &status, 0);
        printf("Parent: ... terminated!\n");
    }
    else
    {
        // Child
        printf("  Child: Process started with pid %d.\n", getpid());
        printf("  Child: 5 second idle:");
        
        int i;
        for (i = 5; i > 0; i--)
        {
            printf("%2d", i); fflush(stdout);
            sleep(1);
        }
        printf(" terminated!\n");
    }

    return 0;
}