#include <iostream>
#include <unistd.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>

using namespace std;

int main() {

    string role;
    int fd {open("tempfile", O_WRONLY|O_CREAT|O_TRUNC, S_IRWXU)};
    if (-1 == fd) {
       perror("Open: ");
       exit (1);
    }

    char low, high;
    pid_t pid;

     
    pid_t forkPid{fork()};
    if (forkPid) {
       low = 'a';
       high = 'z';
    } else {
       low = 'A';
       high = 'Z';
    }

    for(int i =0; i < 100; ++i) {
       for(char letter = low; letter < high; ++letter) {
          write(fd, &letter, sizeof(letter));
       }
    }

    close(fd);
    return 0;
}