My code

#include <SFML/Graphics.hpp>
#include <iostream>

void randomize()
{

}
int main()
{
	sf::RectangleShape snake;
	sf::RectangleShape apple;
	sf::RectangleShape ennemy;

	float originalVelocity(1.0f);
	float speed(1.0f);

	sf::RenderWindow window(sf::VideoMode(800, 600), "Snake");
	window.setFramerateLimit(120);

	while (window.isOpen())
	{

		snake.setSize(sf::Vector2f(10, 10));
		snake.setFillColor(sf::Color::Green);

		apple.setSize(sf::Vector2f(5, 5));
		apple.setFillColor(sf::Color::Red);

		ennemy.setSize(sf::Vector2f(10, 10));
		ennemy.setFillColor(sf::Color::Black);

		sf::Vector2f ennemiesPosition = ennemy.getPosition();
		sf::Vector2f snakePosition = snake.getPosition();

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


		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::Z))
		{
			snake.move(0.0f, -speed);
		}
		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::S))
		{
			snake.move(0.0f, speed);
		}
		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::A))
		{
			snake.move(-speed, 0.0f);
		}
		if (sf::Keyboard::isKeyPressed(sf::Keyboard::Key::D))
		{
			snake.move(speed, 0.0f);
		}

		if (sf::Mouse::isButtonPressed(sf::Mouse::Left))
		{
			// get the current mouse position in the window
			sf::Vector2i pixelPos = sf::Mouse::getPosition(window);
            // convert it to world coordinates
			sf::Vector2f worldPos = window.mapPixelToCoords(pixelPos);
            ennemy.setPosition(worldPos);
		}

		if (snake.getPosition().x > ennemy.getPosition().x)
		{
			ennemiesPosition.x += speed;
		}

		if (snake.getPosition().y > ennemy.getPosition().y)
		{
			ennemiesPosition.y += speed;
		}

		if (snake.getPosition().x < ennemy.getPosition().x)
		{
			snakePosition.x -= speed;
		}

		if (snake.getPosition().y < ennemy.getPosition().y)
		{
			snakePosition.y -= speed;
		}

		window.clear(sf::Color::Blue);
		window.draw(snake);
		window.draw(ennemy);
		window.display();
	}

	return 0;
}