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


main()
{
  int tube1a[2];
  int tube1b[2];
  int tube2a[2];
  int tube2b[2];
  int chiffre = 0;
  int lettre = 0;
  char c;

  /* création de fils1 */
  pipe(tube1a);
  pipe(tube1b);
  if(fork()==0) { /* code de fils1 (qui compte les chiffres) */
    
    close(tube1a[1]);
    while(read(tube1a[0],&c,1)>0)
      {
        chiffre++;
      }      
    write(tube1b[1],&chiffre,sizeof(int));
    close(tube1b[1]);
    exit(0);
  }
     
  /* création de fils2 */
  pipe(tube2a);
  pipe(tube2b);
  if(fork()==0) { /* code de fils2 (qui compte les lettres) */

    
    close(tube2a[1]);
    while(read(tube2a[0],&c,1)>0)
      {
	lettre++;
      }      

    write(tube2b[1],&lettre,sizeof(int));
    close(tube2b[1]);
    exit(0);
  }

  /* code du père */
  close(tube1a[0]);
  close(tube2a[0]);
  
  while(read(0,&c,1)>0)
    {
      if(isdigit(c)) /* chiffre */
	write(tube1a[1],&c,1);
      if(isalpha(c)) /* lettre */
        write(tube2a[1],&c,1);
    }

  close(tube1a[1]);
  close(tube2a[1]);

  read(tube1b[0],&chiffre,sizeof(int));   
  read(tube2b[0],&lettre,sizeof(int));   

  /* affichage des résultats */

  printf("nb de chiffres = %d\n",chiffre);
  printf("nb de lettres = %d\n",lettre);
  
  close(tube1b[0]);
  close(tube2b[0]);

  wait(NULL);
  wait(NULL);
  exit(0);
}