kbhit() in mac

Question

hi ppl. I am new to cpp in mac. I got error when I used kbhit() in my program. I used #include but got error too, so I searched and test with #include but error is still remained. so plz help me. thanks in advance.

Answer 1

kbhit() is non-standard. In fact, I don't believe there is a standard function for detecting keyboard input. The best you can do is read a character from stdin using e.g. fgetc, and hope it's not redirected from somewhere else.

Answer 2

No idea if this would work on Mac, but here's some code that I've used to get a single keypress on Linux.

int mygetch() {
    char ch;
    int error;
    static struct termios Otty, Ntty;

    fflush(stdout);
    tcgetattr(0, &Otty);
    Ntty = Otty;

    Ntty.c_iflag  =  0;  /* input mode  */
    Ntty.c_oflag  =  0;  /* output mode  */
    Ntty.c_lflag &= ~ICANON; /* line settings  */

#if 1
    /* disable echoing the char as it is typed */
    Ntty.c_lflag &= ~ECHO; /* disable echo  */
#else
    /* enable echoing the char as it is typed */
    Ntty.c_lflag |=  ECHO; /* enable echo   */
#endif

    Ntty.c_cc[VMIN]  = CMIN; /* minimum chars to wait for */
    Ntty.c_cc[VTIME] = CTIME; /* minimum wait time */

#if 1
    /*
    * use this to flush the input buffer before blocking for new input
    */
    #define FLAG TCSAFLUSH
#else
    /*
    * use this to return a char from the current input buffer, or block if
    * no input is waiting.
    */
    #define FLAG TCSANOW

#endif

    if ((error = tcsetattr(0, FLAG, &Ntty)) == 0) {
     error  = read(0, &ch, 1 );       /* get char from stdin */
     error += tcsetattr(0, FLAG, &Otty);   /* restore old settings */
    }

    return (error == 1 ? (int) ch : -1 );
}

Answer 3

See my answer to a related question at http://stackoverflow.com/questions/448944/c-non-blocking-keyboard-input#448982