C++ SDL Keydown Not Working Please Help Me

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Keydown is not working. Please help me. Repo, https://github.com/MintMellowCat/sdl-helper-cpp, code:

bool keyDown(SDL_Keycode key) {
        SDL_Event event;

        if (SDL_PollEvent(&event))
        {
            switch (event.type)
            {
            case SDL_KEYDOWN:
                if (event.key.keysym.sym == key) {
                    return true;
                } else {
                    return false;
                }
            }
        }

        return 0;
    }


from Recent Questions - Stack Overflow https://ift.tt/3coX5x6
https://ift.tt/eA8V8J

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