您的计算机缺少SDL2.dll

Question

您好我正在关注SDL教程，但是当我尝试运行该程序时，我收到此错误：

The program can't start because SDL2.dll is missing from your computer. Try reinstalling the program to fix this problem

这个问题的其他答案都没有帮助我。我尝试将SDL2.dll文件放在Debug文件夹中，该文件夹包含.exe文件，项目根文件夹和带有.cpp文件的文件夹

我不认为我的代码对这个问题很重要，但无论如何它都在这里。

的main.cpp

 #include "MainGame.h"
#include <iostream>
int main(int argc, char ** argv)
{
    MainGame mainGame;
    mainGame.run();

    return 0;
}

MainGame.h

#pragma once
#include <SDL.h>
#include <GL/glew.h>

enum class GameState {PLAY, EXIT};

class MainGame
{
public:
    MainGame();
    ~MainGame();

    void run();
private:
    void initSystems();
    void gameLoop();
    void processInput();
    void drawGame();

    SDL_Window * _window;
    int _screenWidth;
    int _screenHeight;
    GameState _gameState;
};

MainGame.cpp

#include "MainGame.h"
#include <SDL.h>
#include <iostream>
#include <string>

void fatalError(std::string errorString)
{
    std::cout << errorString << std::endl;
    std::cout << "Enter any key to quit....";
    int tmp;
    std::cin >> tmp;
    SDL_Quit();
}
MainGame::MainGame()
{
    _window = nullptr;
    _screenWidth = 1024;
    _screenHeight = 720;
    _gameState = GameState::PLAY;
}


MainGame::~MainGame()
{
}

void MainGame::run()
{
    initSystems();

    gameLoop();
}

void MainGame::initSystems()
{
    SDL_Init(SDL_INIT_EVERYTHING);
    _window = SDL_CreateWindow("Game Engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, _screenWidth, _screenHeight, SDL_WINDOW_OPENGL);

    if (_window == nullptr)
    {
        fatalError("SDL Window could not be created!");
    }

    SDL_GLContext glContext = SDL_GL_CreateContext(_window);
    if (glContext == nullptr)
    {
        fatalError("SDL_GLContext could not be created!");
    }

    GLenum error = glewInit();
    if (error != GLEW_OK)
    {
        fatalError("Could not initialize glew");
    }

    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);

    glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
}

void MainGame::gameLoop()
{
    while(_gameState != GameState::EXIT)
    {
        processInput();
        drawGame();
    }
}

void MainGame::processInput()
{
    SDL_Event e;

    while (SDL_PollEvent(&e)) 
    {
        switch (e.type)
        {
            case SDL_QUIT:
                _gameState = GameState::EXIT;
                break;
            case SDL_MOUSEMOTION:
                std::cout << e.motion.x << " " << e.motion.y << std::endl;
                    break;
        }
    }
}

void MainGame::drawGame()
{
    glClearDepth(1.0);
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

    SDL_GL_SwapWindow(_window);
}

我正在使用visual studio 2015。