(8%) An orphan process is a process whose parent process no longer exists, i.e., either it has finished or terminated without waiting for its child processes to terminate. Please finish the following code within the box, which can create an orphan process.

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

int main ()
{
    int pid = fork();
    if (pid > 0)
    {
        // this is parent process
        ____________
    }
    else if (pid == 0)
    {
        // this is child process
        ____________
    }
    return 0;
}