Linux練習（讀取字元立即回顯）

#include <stdio.h>#include <termios.h>int main(){        char s;//        FILE *in;//        FILE *out;        struct termios initial_settings,new_settings;//        in=fopen("/dev/tty","r");//        out=fopen("/dev/tty","w");        tcgetattr(fileno(stdin),&initial_settings);//儲存原來的設定        new_settings=initial_settings;　　　　//開始新終端控制設定        new_settings.c_lflag &= ～ICANON;        new_settings.c_lflag &= ～ECHO;        new_settings.c_cc[VMIN] = 1;        new_settings.c_cc[VTIME] = 0;        if(tcsetattr(fileno(stdin),TCSANOW,&new_settings)!=0) //應用新的設定                fprintf(stderr,"coutld not set attributes\n");        do        {            s=fgetc(stdin);            fprintf(stdout,"\nyou input %c\n",s);        }while(s!='q');                tcsetattr(fileno(stdin),TCSANOW,&initial_settings);//返回原來的設定                        return 0;}