#include <termio.h> #include <stdio.h> int scanKeyboard() { int in; struct termios new_settings; struct termios stored_settings; tcgetattr(0,&stored_settings); new_settings = stored_settings; new_settings.c_lflag &= (~ICANON); new_settings.c_cc[VTIME] = 0; tcgetattr(0,&stored_settings); new_settings.c_cc[VMIN] = 1; tcsetattr(0,TCSANOW,&new_settings); in = getchar(); tcsetattr(0,TCSANOW,&stored_settings); return in; } //这个方法就可以,返回值是该键的ASCII码值,不需要回车的,
//测试函数 int main(){ while(1){ printf(":%d",scanKeyboard()); } }
更详细的参考 man 3 tcgetattr
ICANON
Enable canonical mode. This enables the special characters EOF, EOL, EOL2, ERASE, KILL, LNEXT, REPRINT, STATUS, and WERASE, and buffers by lines.
可以看出ICNAON标志位启用了整行缓存。
所以,new_settings.c_lflag &= (~ICANON);这句屏蔽整行缓存。那就只能单个了。
另外一个可运行的例子:http://blog.csdn.net/alangdangjia/article/details/27697721
注:通过while循环读取键盘效率很低,参考使用异步事件或者多线程技术。单线程为阻塞式的