在用于sdl的cpp中未加载键盘事件

#include <SDL.h>

int main(int argc, char* argv[]) {
    SDL_Init(SDL_INIT_VIDEO);

    SDL_Window* window = SDL_CreateWindow("SDL Keyboard Event", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 800, 600, SDL_WINDOW_SHOWN);
    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, 0);

    bool quit = false;
    SDL_Event event;

    while (!quit) {
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                quit = true;
            }
            else if (event.type == SDL_KEYDOWN) {
                // 处理键盘按下事件
                SDL_KeyboardEvent keyEvent = event.key;
                SDL_Keycode keycode = keyEvent.keysym.sym;
                // 处理按下的键盘按键
            }
            else if (event.type == SDL_KEYUP) {
                // 处理键盘释放事件
                SDL_KeyboardEvent keyEvent = event.key;
                SDL_Keycode keycode = keyEvent.keysym.sym;
                // 处理释放的键盘按键
            }
        }

        // 渲染和更新游戏逻辑

        SDL_RenderPresent(renderer);
    }

    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}