1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::VideoMode::VideoMode(unsigned int,unsigned int,unsigned int)" (__imp_??0VideoMode@sf@@QAE@III@Z) referenced in function _main
1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: void __thiscall sf::Window::close(void)" (__imp_?close@Window@sf@@QAEXXZ) referenced in function _main
1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __thiscall sf::Window::isOpen(void)const " (__imp_?isOpen@Window@sf@@QBE_NXZ) referenced in function _main
1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: bool __thiscall sf::Window::pollEvent(class sf::Event &)" (__imp_?pollEvent@Window@sf@@QAE_NAAVEvent@2@@Z) referenced in function _main
1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: __thiscall sf::RenderWindow::RenderWindow(class sf::VideoMode,class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > const &,unsigned int,struct sf::ContextSettings const &)" (__imp_??0RenderWindow@sf@@QAE@VVideoMode@1@ABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@IABUContextSettings@1@@Z) referenced in function _main
1>Pong.obj : error LNK2019: unresolved external symbol "__declspec(dllimport) public: virtual __thiscall sf::RenderWindow::~RenderWindow(void)" (__imp_??1RenderWindow@sf@@UAE@XZ) referenced in function "public: virtual void * __thiscall sf::RenderWindow::`scalar deleting destructor'(unsigned int)" (??_GRenderWindow@sf@@UAEPAXI@Z)
1>Pong.obj : error LNK2001: unresolved external symbol "private: virtual bool __thiscall sf::RenderWindow::activate(bool)" (?activate@RenderWindow@sf@@EAE_N_N@Z)
1>Pong.obj : error LNK2001: unresolved external symbol "public: virtual class sf::Vector2<unsigned int> __thiscall sf::RenderWindow::getSize(void)const " (?getSize@RenderWindow@sf@@UBE?AV?$Vector2@I@2@XZ)
1>Pong.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall sf::RenderWindow::onCreate(void)" (?onCreate@RenderWindow@sf@@MAEXXZ)
1>Pong.obj : error LNK2001: unresolved external symbol "protected: virtual void __thiscall sf::RenderWindow::onResize(void)" (?onResize@RenderWindow@sf@@MAEXXZ)