#include <iostream>
#include <unistd.h>
#include <stdio.h>
#include <vector>
#include <fcntl.h>

using namespace std;

vector<string> words{"now", "is", "the time" , "to", "STOP"};

int main() {
   int fd[2];

   if (-1 == pipe(fd)) {
       perror("Pipe failed"); 
       exit(1);
   } 

   pid_t pid = fork();
   if (pid == -1) {
       perror("Fork failed");
       exit(1);
   }

   if (pid == 0) {
      // this is the child and it will write 
      close(STDOUT_FILENO);
      dup(fd[STDOUT_FILENO]);
      close (fd[STDIN_FILENO]);

      cout << "This is a string" << endl;
      for (auto word: words) {
          cout << word << endl; 
      }
      exit(0);
   } else {
      // the parent will read.
      string phrase;
      close(STDIN_FILENO);
      dup(fd[STDIN_FILENO]);
      close (fd[STDOUT_FILENO]);
  
      getline(cin, phrase);
      while(cin) {
         cout << phrase << endl;
         getline(cin,phrase);
      }

      exit(0);
   }

   // never encountered
   return 0;
}