/*
 * system call API hello world
 */

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

main()
{
  char buf[1000];
  int i;

  write (STDOUT_FILENO, "hello world! please input: \n", 
	 strlen("hello world! please input: \n"));

  dup(0);
  
  /*   i = read (0, buf, 1000); */
  close(0);

  scanf("%s", buf);

  printf("after scanf buf = %s\n", buf);

  dup(3);

  scanf("%s", buf);

  printf("after second scanf buf = %s\n", buf);

  write(1, "the input is: ", 14);
  write(1, buf, strlen(buf));
}