-- pipe.c --

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

int 
main(void)
{
  int  fd[2], nbytes;
  pid_t childpid;
  char string[] = "Hello, world!\n";
  char readbuffer[80];

  pipe(fd);

  if ((childpid = fork()) == -1) {
    perror("fork");
    exit(1);
  }
  if (childpid == 0) {
    /* Child process closes up input side of pipe */
    close(fd[0]);

    /* Send "string" through the output side of pipe */
    while (scanf("%s", readbuffer) != EOF)
      write(fd[1], readbuffer, (strlen(readbuffer) + 1));
    exit(0);
  } else {
    /* Parent process closes up output side of pipe */
    close(fd[1]);

    /* Read in a string from the pipe */
    while (nbytes = read(fd[0], readbuffer, sizeof(readbuffer)))
      printf("Received %d bytes: %s\n", nbytes, readbuffer);
  }

  return (0);
}

-- pthread.c --
-- compile with the -lpthread flag --
#include <stdio.h>
#include <string.h>
#include <pthread.h>
#include <unistd.h>

char buf[1024];
int p = 0;

void printer(){
  while (1){
    sleep(1);
    printf("\nBuffer: %s\n", buf);
    p = 0;
    memset(buf, '\0', sizeof(buf));
  }
}

int main(){
  pthread_t prnt;
  char x;

  buf[0]='\0';
  pthread_create(&prnt, NULL, (void *)(printer), NULL);
  while ((x = getchar()) != EOF)
    buf[p++] = x;
  return 0;
}