1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::String::String(char const *,class std::locale const &)" (__imp_??0String@sf@@QEAA@PEBDAEBVlocale@std@@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::String::~String(void)" (__imp_??1String@sf@@QEAA@XZ) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::VideoMode::VideoMode(unsigned int,unsigned int,unsigned int)" (__imp_??0VideoMode@sf@@QEAA@III@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl sf::Window::close(void)" (__imp_?close@Window@sf@@QEAAXXZ) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __cdecl sf::Window::isOpen(void)const " (__imp_?isOpen@Window@sf@@QEBA_NXZ) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __cdecl sf::Window::pollEvent(class sf::Event &)" (__imp_?pollEvent@Window@sf@@QEAA_NAEAVEvent@2@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl sf::Window::display(void)" (__imp_?display@Window@sf@@QEAAXXZ) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::Color::Color(unsigned char,unsigned char,unsigned char,unsigned char)" (__imp_??0Color@sf@@QEAA@EEEE@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl sf::Shape::setFillColor(class sf::Color const &)" (__imp_?setFillColor@Shape@sf@@QEAAXAEBVColor@2@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::CircleShape::CircleShape(float,unsigned __int64)" (__imp_??0CircleShape@sf@@QEAA@M_K@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __cdecl sf::CircleShape::~CircleShape(void)" (__imp_??1CircleShape@sf@@UEAA@XZ) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl sf::RenderTarget::clear(class sf::Color const &)" (__imp_?clear@RenderTarget@sf@@QEAAXAEBVColor@2@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __cdecl sf::RenderTarget::draw(class sf::Drawable const &,class sf::RenderStates const &)" (__imp_?draw@RenderTarget@sf@@QEAAXAEBVDrawable@2@AEBVRenderStates@2@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __cdecl sf::RenderWindow::RenderWindow(class sf::VideoMode,class sf::String const &,unsigned int,struct sf::ContextSettings const &)" (__imp_??0RenderWindow@sf@@QEAA@VVideoMode@1@AEBVString@1@IAEBUContextSettings@1@@Z) referenced in function main
1>main.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __cdecl sf::RenderWindow::~RenderWindow(void)" (__imp_??1RenderWindow@sf@@UEAA@XZ) referenced in function main
1>main.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static class sf::RenderStates const sf::RenderStates::Default" (__imp_?Default@RenderStates@sf@@2V12@B)
1>main.obj : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static class sf::Color const sf::Color::Green" (__imp_?Green@Color@sf@@2V12@B)
1>C:UsersStephensourcereposNeuralNetx64DebugNeuralNet.exe : fatal error LNK1120: 17 unresolved externals

int main()
{
    sf::RenderWindow window(sf::VideoMode(200, 200), "SFML works!");
    sf::CircleShape shape(100.f);
    shape.setFillColor(sf::Color::Green);

    while (window.isOpen())
    {
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
                window.close();
        }

        window.clear();
        window.draw(shape);
        window.display();
    }

    return 0;
}