D:\Installed\msys64 

pacman -S --needed base-devel mingw-w64-ucrt-x86_64-toolchain

D:\Installed\msys64\ucrt64\bin

gcc --version

pacman -S mingw-w64-x86_64-SDL2 mingw-w64-x86_64-SDL2_image mingw-w64-x86_64-SDL2_mixer mingw-w64-x86_64-SDL2_ttf

#include <SDL2/SDL.h>
#include <iostream>

#undef main

int main(int argc, char* argv[]) {
    // SDL 초기화
    if (SDL_Init(SDL_INIT_VIDEO) != 0) {
        std::cerr << "SDL_Init Error: " << SDL_GetError() << std::endl;
        return 1;
    }
    // SDL 창 생성
    SDL_Window* window = SDL_CreateWindow("Main Window",
                                          100, 100, 800, 600, SDL_WINDOW_SHOWN);
    if (!window) {
        std::cerr << "SDL_CreateWindow Error: " << SDL_GetError() << std::endl;
        SDL_Quit();
        return 1;
    }

    // SDL 렌더러 생성
    SDL_Renderer* renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (!renderer) {
        std::cerr << "SDL_CreateRenderer Error: " << SDL_GetError() << std::endl;
        SDL_DestroyWindow(window);
        SDL_Quit();
        return 1;
    }

    // 텍스처 생성을 위한 surface 생성
    SDL_Surface* surface = SDL_CreateRGBSurface(0, 80, 400, 32, 0, 0, 0, 0);
    if (!surface) {
        std::cerr << "Surface creation failed: " << SDL_GetError() << std::endl;
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
        SDL_Quit();
        return 1;
    }

    // surface를 녹색으로 채우기
    SDL_FillRect(surface, NULL, SDL_MapRGB(surface->format, 0, 255, 0));

    // surface로부터 텍스처 생성
    SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, surface);
    SDL_FreeSurface(surface); // surface는 더 이상 필요없음

    if (!texture) {
        std::cerr << "Texture creation failed: " << SDL_GetError() << std::endl;
        SDL_DestroyRenderer(renderer);
        SDL_DestroyWindow(window);
        SDL_Quit();
        return 1;
    }

    bool quit = false;
    SDL_Event e;

    while (!quit) {
        while (SDL_PollEvent(&e)) {
            if (e.type == SDL_QUIT) {
                quit = true;
            }
            if (e.type == SDL_KEYDOWN) {
                if (e.key.keysym.sym == SDLK_LEFT) {
                    // 왼쪽 화살표 키
                } else if (e.key.keysym.sym == SDLK_RIGHT) {
                    // 오른쪽 화살표 키
                }
            }
        }
        // 그릴 색깔 검은색으로 설정
        SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
        // 화면 지우기 - 검은색으로 그리기
        SDL_RenderClear(renderer);

        // 사각형의 위치와 크기 설정
        SDL_Rect destRect;
        destRect.w = 80;
        destRect.h = 400;
        destRect.x = (800 - destRect.w) / 2;
        destRect.y = (600 - destRect.h) / 2;

        // 회전 중심점 설정
        SDL_Point center = {destRect.w / 2, destRect.h / 2};

        // 텍스처를 43도 회전하여 그리기
        SDL_RenderCopyEx(renderer, texture, NULL, &destRect, 43.0, &center, SDL_FLIP_NONE);
        // 화면 업데이트
        SDL_RenderPresent(renderer);
        // 쉬기 16ms
        SDL_Delay(16);
    }

    // 정리
    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
    return 0;
}

{
    "version": "2.0.0",
    "tasks": [
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",
            "command": "g++",
            "args": [
                "-fdiagnostics-color=always",
                "-g",
                "main.cpp",
                "-o",
                "main.exe",
                "-I",
                "D:/Installed/msys64/mingw64/include",
                "-L",
                "D:/Installed/msys64/mingw64/lib",
                "-lSDL2main",
                "-lSDL2",
                "-mconsole"
            ],
            "options": {
                "cwd": "${fileDirname}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "dependsOn": ["Copy SDL2 DLL"]
        },
        {
            "label": "Copy SDL2 DLL",
            "type": "shell",
            "command": "copy",
            "args": [
                "D:\\Installed\\msys64\\mingw64\\bin\\SDL2.dll",
                "${fileDirname}"
            ],
            "problemMatcher": []
        }
    ]
}

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug SDL2 Program",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/main.exe",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "gdb.exe",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ],
            "preLaunchTask": "C/C++: g++ build active file"
        }
    ]
}