#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
     
/* O pai fala e o filho escuta */

/*  pai | filho  */ 

int  main (void) {
  pid_t pid;
  int mypipe[2];
  
  /* Create the pipe. */
  pipe (mypipe);
     
  /* Create the child process. */
  pid = fork ();
  if (pid == 0) {
    char s[10];
    close (mypipe[1]);
    dup2(mypipe[0], 0);
    close(mypipe[0]);
    scanf("%s", s);
    printf("%s\n", s);
  } else {  /* This is the parent process. */
    FILE* stream_pai;
    char* s = "hello";
    close (mypipe[0]);
    dup2(mypipe[1], 1);
    close(mypipe[1]);
    printf("%s", s);
  }
  return 0;
}