init commit, with sample code

main.cpp

@@ -0,0 +1,53 @@
+#include <iostream>
+
+#include "SFML/Graphics.hpp"
+
+int main()
+{
+    std::cout << "Game started\n";
+    sf::RenderWindow window(sf::VideoMode(600, 800), "My window");
+    window.setVerticalSyncEnabled(true);
+    window.setFramerateLimit(60);
+
+    sf::RectangleShape rectangle(sf::Vector2f(120.0f, 50.0f));
+    float sizeIncrement = 1.0f;
+
+    while (window.isOpen()) {
+        window.clear();
+
+        if(rectangle.getSize().x > 5 && rectangle.getSize().y > 5 && rectangle.getSize().x < 300 && rectangle.getSize().y < 300) {
+            rectangle.setSize(rectangle.getSize() + sf::Vector2f(sizeIncrement, sizeIncrement));
+            rectangle.setPosition(
+                float(window.getSize().x) / 2 - rectangle.getSize().x / 2,
+                float(window.getSize().y) / 2 - rectangle.getSize().y / 2
+            );
+        } else {
+            rectangle.setSize(sf::Vector2f(120.0f, 50.0f));
+            rectangle.setPosition(
+             float(window.getSize().x) / 2 - rectangle.getSize().x / 2,
+             float(window.getSize().y) / 2 - rectangle.getSize().y / 2
+            );
+        }
+
+
+        // Tu są handlowane eventy
+        sf::Event event{};
+        while (window.pollEvent(event)) {
+            if(event.type == sf::Event::MouseWheelScrolled) {
+                if(event.mouseWheelScroll.delta > 0) {
+                    sizeIncrement = 1.0f;
+                } else {
+                    sizeIncrement = -1.0f;
+                }
+            }
+
+            if (event.type == sf::Event::Closed)
+                window.close();
+        }
+
+        window.draw(rectangle);
+        window.display();
+    }
+
+    return 0;
+}