Linux下有没有类似Windows的VC下的kbhit()函数？我需要用

① 没有直接的对应，需要自己实现。

② 可以写c函数、汇编、或用第3方跨平台的函数库（比如ncurses）。下面是linux下c函数实现:

#include <stdio.h>

#include <termios.h>

#include <unistd.h>

#include <sys/types.h>

#include <sys/time.h>

void changemode(int)

int  kbhit(void)

int main(void)

{

  int ch

  changemode(1) /* 注意，打开mode */

  while ( !kbhit() )

  {

    putchar('.')

  }

  ch = getchar()

  printf("\nGot %c\n", ch)

  changemode(0) /* 注意，关闭mode */

  return 0

}

void changemode(int dir)

{

  static struct termios oldt, newt

  if ( dir == 1 )

  {

    tcgetattr( STDIN_FILENO, &oldt)

    newt = oldt

    newt.c_lflag &= ~( ICANON | ECHO )

    tcsetattr( STDIN_FILENO, TCSANOW, &newt)

  }

  else

    tcsetattr( STDIN_FILENO, TCSANOW, &oldt)

}

int kbhit (void)

{

  struct timeval tv

  fd_set rdfs

  tv.tv_sec = 0

  tv.tv_usec = 0

  FD_ZERO(&rdfs)

  FD_SET (STDIN_FILENO, &rdfs)

  select(STDIN_FILENO+1, &rdfs, NULL, NULL, &tv)

  return FD_ISSET(STDIN_FILENO, &rdfs)

}

---- 上述代码来自互联网。

在Unix/Linux下，并没有提供int kbhit(void)这个函数。在linux下开发控制台程序时，需要自己编写kbhit()实现的程序了。下面是kbhit在Unix/Linux下的一个实现。用到了一种终端 *** 作库termios。下面是头文件kbhit.h：QUOTE:#ifndef KBHITh#define KBHIThvoid init_keyboard(void)void close_keyboard(void)int kbhit(void)int readch(void)#endif下面式源程序kbhit.c：QUOTE:#include "kbhit.h"#include <stdio.h>#include <termios.h>static struct termios initial_settings, new_settingsstatic int peek_character = -1void init_keyboard(){tcgetattr(0,&initial_settings)new_settings = initial_settingsnew_settings.c_lflag &= ~ICANONnew_settings.c_lflag &= ~ECHOnew_settings.c_lflag &= ~ISIGnew_settings.c_cc[VMIN] = 1new_settings.c_cc[VTIME] = 0tcsetattr(0, TCSANOW, &new_settings)}void close_keyboard(){tcsetattr(0, TCSANOW, &initial_settings)}int kbhit(){unsigned char chint nreadif (peek_character != -1) return 1new_settings.c_cc[VMIN]=0tcsetattr(0, TCSANOW, &new_settings)nread = read(0,&ch,1)new_settings.c_cc[VMIN]=1tcsetattr(0, TCSANOW, &new_settings)if(nread == 1) {peek_character = chreturn 1}return 0}int readch(){char chif(peek_character != -1) {ch = peek_characterpeek_character = -1return ch}read(0,&ch,1)return ch}

---