#include <unistd.h>   //_getch
#include <termios.h>  //_getch
using namespace std;
char getch(){
    char buf=0;
    struct termios old={0};
    fflush(stdout);
    if(tcgetattr(0, &old)<0)
        cerr<<"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)
        cerr<<"tcsetattr ICANON";
    if(read(0,&buf,1)<0)
        cerr<<"read()";
    old.c_lflag|=ICANON;
    old.c_lflag|=ECHO;
    if(tcsetattr(0, TCSADRAIN, &old)<0)
        cerr<<"tcsetattr ~ICANON";
    printf("%c\n",buf);
    return buf;
 }
 main(){
     char x=getch();
     cout<<x;
     return 0;
}