#include <SFML\Graphics.hpp>

int main(int argc, char const *argv[]) {

    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML Pong");

    while (window.isOpen()) {

       sf::Event event;

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

    return 0;
}

C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0xe5): undefined reference to `_imp___ZN2sf6StringC1EPKcRKSt6locale'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x10b): undefined reference to `_imp___ZN2sf9VideoModeC1Ejjj'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x147): undefined reference to `_imp___ZN2sf12RenderWindowC1ENS_9VideoModeERKNS_6StringEjRKNS_15ContextSettingsE'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x178): undefined reference to `_imp___ZN2sf6Window5closeEv'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x18d): undefined reference to `_imp___ZN2sf6Window9pollEventERNS_5EventE'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x1a3): undefined reference to `_imp___ZNK2sf6Window6isOpenEv'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x1bb): undefined reference to `_imp___ZN2sf12RenderWindowD1Ev'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x1e2): undefined reference to `_imp___ZN2sf12RenderWindowD1Ev'
C:\WINDOWS\Temp\cc5P7P9e.o:main.cpp:(.text+0x209): undefined reference to `_imp___ZN2sf12RenderWindowD1Ev'
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: C:\WINDOWS\Temp\cc5P7P9e.o: bad reloc address 0xf in section `.text$_ZN2sf6StringD1Ev[__ZN2sf6StringD1Ev]'
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../../mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status
[Finished in 8.8s with exit code 1]
[shell_cmd: g++ "C:\Doomsday\main.cpp" -o "C:\Doomsday/main" && "C:\Doomsday/main"]
[dir: C:\Doomsday]
[path: C:\Program Files\NVIDIA Corporation\PhysX\Common;C:\Ruby200\bin;C:\Ruby21\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\MinGW\bin]

#include <QApplication>
#include "main_menu.hpp"

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

     QApplication game(argc, argv);

     MainMenu MyMainMenu;

     MyMainMenu.actionsButtons();
     MyMainMenu.showMainMenu();

     return game.exec();
}

#ifndef MAIN_MENU_HPP
#define MAIN_MENU_HPP

#include <QPushButton>
#include <QHBoxLayout>

class MainMenu {
public:
     MainMenu();
     ~MainMenu();
     void showMainMenu();
     void actionsButtons();

private:
     QWidget *window;
     QPushButton *beginButton;
     QPushButton *authorsButton;
     QPushButton *closeButton;
     QHBoxLayout *layout;
};

#endif // MAIN_MENU_HPP

#include <QApplication>
#include <QPushButton>
#include <QHBoxLayout>
#include "main_menu.hpp"

MainMenu::MainMenu() {
     MainMenu::window = new QWidget();
     MainMenu::beginButton = new QPushButton("Начать игру");
     MainMenu::authorsButton = new QPushButton("Авторы");
     MainMenu::closeButton = new QPushButton("Выйти");
     MainMenu::layout = new QHBoxLayout;
}

MainMenu::~MainMenu() {
     delete MainMenu::window;
}

void MainMenu::showMainMenu() {
     window->setWindowTitle("Pirates The Game");

     layout->addWidget(beginButton);
     layout->addWidget(authorsButton);
     layout->addWidget(closeButton);

     window->setLayout(layout);
     window->show();
}

void actionsButtons() {
     QObject::connect(MainMenu::closeButton, SIGNAL(clicked()), &game, SLOT(quit()));
}

#include <iostream>
#include "tinyxml\tinyxml.h"
#include "tinyxml\tinystr.h"
using namespace std;
   
int main() {

     TiXmlDocument doc( "demo.xml" );
     doc.LoadFile();

     cin.get();
     return 0;
}

<?xml version="1.0" ?>
<Hello>World</Hello>