C++ | 如何使用 Linux 从箭头键获取输入

Question

I'm super new to C++ and was wanting to add arrow key functionality to my snake game. I've been scouring the Inte.net trying to find a way to do this without "conio.h" as I am using Linux. How would I go about doing this and can I get some example code?

Thank you!

Answer 1

You'd be best off using ncurses - just google for some tutorials to get yourself started. It can do simple things like clear the screen, get the terminal dimensions, position the cursor at arbitrary coordinates, write text in arbitrary colours, and yes - read characters from the keyboard without waiting for enter to be pressed. Enjoy your project!

Answer 2

Try out:

#include <ncurses.h>

int main(){
    int ch;

    initscr();
    raw();
    keypad(stdscr, TRUE);
    noecho();


    while ((ch = getch()) != '#') {
        switch(ch) {
            case KEY_UP: printw("\nUp");
            break;

            case KEY_DOWN: printw("\nDown");
            break;

            case KEY_LEFT: printw("\nLeft");
            break;

            case KEY_RIGHT: printw("\nRight");
            break;

            default: printw("%c", ch);
        }
    }
    refresh();
    getch();
    endwin();
}