#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>


int main (int argc, char* argv[]){

int fd[2];
int fd;
 mkfifo("k",0644);
 
 if(fork()==0){
 fd = open("k",O_WRONLY);
 dup2(fd[1],f);
 execlp("ls","ls",NULL);
 
 }
 else{
 fd = open("k",O_WRONLY);
 dup2(fd[0],f);
 execlp("wc","wc",NULL);
 unlink&#40;"k"&#41;;
 }


}