어려워요

#include <stdio.h>
#include <termio.h>

 int getch(void)
    {
        int ch;
        struct termios buf, save;
        tcgetattr(0,&save);
        buf = save;
        buf.c_lflag &= ~(ICANON|ECHO);
        buf.c_cc[VMIN] = 1;
        buf.c_cc[VTIME] = 0;
        tcsetattr(0, TCSAFLUSH, &buf);
        ch = getchar();
        tcsetattr(0, TCSAFLUSH, &save);
        return ch;
    }

 

Name : Linux에서 _kbhit() 구현
Compiler : gcc 4.1.2
Enviroment : Cent OS 5.5 (2.6.18)
Compile command : (default)
---------------------------------------------------------------------------

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

int kbhit(void)
{
  struct termios oldt, newt;
  int ch;
  int oldf;

  tcgetattr(STDIN_FILENO, &oldt);
  newt = oldt;
  newt.c_lflag &= ~(ICANON | ECHO);
  tcsetattr(STDIN_FILENO, TCSANOW, &newt);
  oldf = fcntl(STDIN_FILENO, F_GETFL, 0);
  fcntl(STDIN_FILENO, F_SETFL, oldf | O_NONBLOCK);

  ch = getchar();

  tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
  fcntl(STDIN_FILENO, F_SETFL, oldf);

  if(ch != EOF)
  {
    ungetc(ch, stdin);
    return 1;
  }

  return 0;
}

int main(void)
{
  while(!kbhit())
    puts("Press a key!");
  printf("You pressed '%c'!\n", getchar());
  return 0;
}