getch

getch.cpp

#include <unistd.h>   //_getch
#include <termios.h>  //_getch
#include <cstdio>
#include <iostream>
using namespace std;
char getch(){
    char buf=0;
    struct termios old={0};
    fflush(stdout);
    if(tcgetattr(0, &old)<0)
        perror("tcsetattr()");
    old.c_lflag&=~ICANON;
    old.c_lflag&=~ECHO;
    old.c_cc[VMIN]=1;
    old.c_cc[VTIME]=0;
    if(tcsetattr(0, TCSANOW, &old)<0)
        perror("tcsetattr ICANON");
    if(read(0,&buf,1)<0)
        perror("read()");
    old.c_lflag|=ICANON;
    old.c_lflag|=ECHO;
    if(tcsetattr(0, TCSADRAIN, &old)<0)
        perror ("tcsetattr ~ICANON");
    if (buf == 127) {
        printf("\b ");
        buf = '\b';
    }
    printf("%c", buf);
    return buf;
}