#include <stdio.h>

#include <termios.h>

#include <stdio.h>

#include <unistd.h>

#include <assert.h>

#include <string.h>

char my_getch()

{

        int c=;

        struct termios org_opts, new_opts;

        int res=;

        res=tcgetattr(STDIN_FILENO, &org_opts);

        assert(res==);

        memcpy(&new_opts, &org_opts, sizeof(new_opts));

        new_opts.c_lflag &= ~(ICANON | ECHO | ECHOE | ECHOK | ECHONL | ECHOPRT | ECHOKE | ICRNL);

        tcsetattr(STDIN_FILENO, TCSANOW, &new_opts);

        c=getchar();

        res=tcsetattr(STDIN_FILENO, TCSANOW, &org_opts);

        assert(res==);

        return c;

}

#include <stdio.h>

#include <stdlib.h>

#include <termios.h>

#include <curses.h>

#include <term.h>

#include <unistd.h>

static int peek_character = -; 

int kbhit()

{

    char ch;int x;

    int nread;

    struct termios old_settings,new_settings;

    tcgetattr(STDIN_FILENO,&old_settings);

    new_settings=old_settings;

    new_settings.c_lflag &=~(ICANON|ECHO|ECHOE|ECHOK|ECHONL|ECHOPRT|ECHOKE|ICRNL)  ;

    new_settings.c_cc [VMIN]=  ;

    new_settings.c_cc [VTIME]=  ;

    tcsetattr(STDIN_FILENO,TCSANOW,&new_settings);

    if(peek_character!=-)

        x= ;

    new_settings.c_cc [VMIN]=  ;

    tcsetattr(STDIN_FILENO,TCSANOW,&new_settings);

    nread=read(,&ch,);

    new_settings.c_cc [VMIN]=  ;

    tcsetattr(STDIN_FILENO,TCSANOW,&new_settings);

    if(nread==) {

        peek_character=ch;

        x=;

    }

    else x=;

    tcsetattr(STDIN_FILENO,TCSANOW,&old_settings);

    return x;

}

int readch()

{

    char ch; 

    if(peek_character!=) {

        ch=peek_character;

        peek_character=-;

        return ch;

    }

    read(,&ch,);

    return ch;

}