/***************************************************************************        how to get keyboard key with non blocking in terminal* 声明：*      如何在终端下以非堵塞的方式获取按键的键值，这个想法最初是因为*  在单线程下实现多任务，同时不因键盘输入而堵塞，核心内容来自网络，*  但已经忘了出处。* *                                    2015-7-5 晴 深圳 南山平山村 曾剑锋*************************************************************************/\\\\\\-*- 目录 -*-/////|  一、cat kbhit.h|  二、cat kbhit.c\\\\\\\\\\\\///

一、cat kbhit.h#ifndef __KBHIT_H__#define __KBHIT_H__#include <stdio.h>#include <termios.h>/*** 初始化键盘操作*/void init_keyboard(void);/*** 关闭键盘操作*/void close_keyboard(void);/*** 判断是否有按键按下，如果有案件按下返回1，没有按键按下* 则返回0*/int kbhit(void);/*** 用于在有案件按下之后，读取字符*/int readch(void);#endif // __KBHIT_H__二、cat kbhit.c#include "kbhit.h"static struct termios initial_settings, new_settings;static int peek_character = -1;void init_keyboard(){tcgetattr(0,&initial_settings);new_settings = initial_settings;new_settings.c_lflag &= ~ICANON;new_settings.c_lflag &= ~ECHO;new_settings.c_lflag &= ISIG;new_settings.c_cc[VMIN] = 1;new_settings.c_cc[VTIME] = 0;tcsetattr(0, TCSANOW, &new_settings);}void close_keyboard(){tcsetattr(0, TCSANOW, &initial_settings);}int kbhit(){unsigned char ch;int nread;if (peek_character != -1) return 1;new_settings.c_cc[VMIN]=0;tcsetattr(0, TCSANOW, &new_settings);nread = read(0,&ch,1);new_settings.c_cc[VMIN]=1;tcsetattr(0, TCSANOW, &new_settings);if(nread == 1){peek_character = ch;return 1;}return 0;}int readch(){char ch;if(peek_character != -1){ch = peek_character;peek_character = -1;return ch;}read(0,&ch,1);return ch;}