c++ - CLion 不显示 C++ SDL2 的输出

Question

我正在 CLion 中使用 SDL2 开展一个小项目在 Windows 上。

当我在 CLion 中编译并运行 (Shift+F10) 我的程序时，它没有显示任何控制台输出。但是，当我使用调试器 (Shift+F9) 运行它时，它会显示控制台输出。

我不知道是什么原因造成的。

为确保我的项目或 CLion 没有损坏某些东西，我已将源代码复制到一个新项目并使用相同的 CMakeList.txt 文件对其进行设置，它仍然如此不工作。

我的CMakeList.txt:

CMakeList.txt

cmake_minimum_required(VERSION 3.6)
project(SDL_Project)

set(CMAKE_CXX_STANDARD 14)

# FindSDL2.cmake
list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

find_package(SDL2 REQUIRED)
find_package(SDL2_image REQUIRED)
#find_package(SDL2_ttf REQUIRED)

include_directories(${SDL2_INCLUDE_DIR})
include_directories(${SDL2_IMAGE_INCLUDE_DIR})
#include_directories(${SDL2_TTF_INCLUDE_DIR})

add_executable(SDL_Project src/main.cpp src/Game.cpp src/Game.h)
set_target_properties(SDL_Project PROPERTIES WIN32_EXECUTABLE FALSE)

target_link_libraries(SDL_Project ${SDL2_LIBRARY})
target_link_libraries(SDL_Project ${SDL2_IMAGE_LIBRARIES})
#target_link_libraries(SDL_Project ${SDL2_TTF_LIBRARIES})

我还尝试编译以下代码(没有 SDL2，但使用相同的 CMakeList.txt):

#include <iostream>

int main(int argv, char* args[]) {
    std::cout << "Hello World!" << std::endl;
    return 0;
}

这有同样的问题；没有控制台输出。

在 CMakeList.txt 中没有 find_package、include_directories 和 target_link_libraries 编译上述代码显示控制台输出!所以它与 SDL2 有关，我认为..？

有谁知道是什么原因造成的，以及如何解决？

---

虽然我认为问题出在 CMakeList.txt 上，但这是剩余的代码:

main.cpp

#include <SDL.h>
#include <iostream>

#include "Game.h"

int main(int argv, char* args[]) {

    const int FPS = 60;
    const uint32_t frameDelay = 1000 / FPS;

    const WindowSettings settings = {SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 1280, 720};
    Game game;

    Uint32 frameStart;
    Uint32 frameTime;

    game.init("Game", settings);

    while (game.isRunning()) {
        frameStart = SDL_GetTicks();

        game.handleEvents();
        game.tick();
        game.render();

        frameTime = SDL_GetTicks() - frameStart;

        std::cout << "Frame time: " << frameTime << " / " << frameDelay << std::endl;
        if (frameTime < frameDelay) {
            std::cout << "Frame delay: " << (frameDelay - frameTime) << std::endl;
            SDL_Delay(frameDelay - frameTime);
        }
    }

    game.cleanup();

    return 0;
}

Game.h

#ifndef SDL_PROJECT_GAME_H
#define SDL_PROJECT_GAME_H

#include <SDL.h>

struct WindowSettings {
    int x;
    int y;
    int width;
    int height;
};

class Game {
private:
    bool running;
    SDL_Window* window;
    SDL_Renderer* renderer;

public:
    Game();
    ~Game();

    void init(const char* title, const WindowSettings &settings);
    void tick();
    void render();
    void cleanup();
    void handleEvents();

    bool isRunning() { return running; }
};


#endif //SDL_PROJECT_GAME_H

游戏.cpp

#include <iostream>
#include "Game.h"

Game::Game():
        running(false),
        window(nullptr),
        renderer(nullptr) {
}

Game::~Game() = default;

void Game::init(const char *title, const WindowSettings &settings) {
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        std::cout << "SDL initialization failed: " << SDL_GetError() << std::endl;
        return;
    };

    window = SDL_CreateWindow(title, settings.x, settings.y, settings.width, settings.height, SDL_WINDOW_SHOWN);
    if (window == nullptr) {
        std::cout << "Unable to create window: " << SDL_GetError() << std::endl;
        return;
    }

    renderer = SDL_CreateRenderer(window, -1 , 0);
    if (renderer == nullptr) {
        std::cout << "Unable to create renderer: " << SDL_GetError() << std::endl;
        return;
    }

    running = true;
}

void Game::tick() {

}

void Game::render() {
    SDL_RenderClear(renderer);
    SDL_RenderPresent(renderer);
}

void Game::cleanup() {
    if (renderer) {
        SDL_DestroyRenderer(renderer);
    }
    if (window) {
        SDL_DestroyWindow(window);
    }

    SDL_Quit();
    std::cout << "Game clean exit" << std::endl;
}

void Game::handleEvents() {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        if (event.type == SDL_QUIT) {
            running = false;
        }
    }
}

Answer 1

我能想到 1 个问题。您确定您的运行配置是正确的 CLION 吗？调试版本运行的可执行文件可能与您想象的不同。 CLION 在幕后做了很多事情。单击运行箭头下拉菜单并查看编辑配置或类似的内容。