sfml Getting started with sfml Hello World in a SFML Window

Example

Let's write a small program which will open a window, and write "Hello World" on the screen.

#include <SFML\Graphics.hpp>
#include <cassert>

int main() {
    sf::RenderWindow sfmlWin(sf::VideoMode(600, 360), "Hello World SFML Window");
    sf::Font font;
    //You need to pass the font file location
    if (!font.loadFromFile(/*
                           Put the filename that identify the font file you want to load*/"myfont.ttf")) {
        return -1;
    }
    sf::Text message("Hello, World !", font);

    while (sfmlWin.isOpen()) {

        sf::Event e;
        while (sfmlWin.pollEvent(e)) {

            switch (e.type) {
            case sf::Event::EventType::Closed:
                sfmlWin.close();
                break;
            }
        }

        sfmlWin.clear();
        sfmlWin.draw(message);
        sfmlWin.display();
    }
    return 0;
}

Let's explain what we did there.

First, we created a sf::Font object. We need this object to store the font data that we will use to display the text. After that, we called the loadFromFile method, used to load the font in the memory. We should note that SFML don't know about your system fonts, so you need to provide a filename, not a font name

After that, we created a sf::Text object. We call a 3 parameter constructor taking :

• The string you want to display
• The font the object will use
• The character size in pixel, which we did not pass here, so il will be set to the default value : 30

Since the sf::Text object is ready, we just need to draw it in the main sfml loop, by calling the draw method on the sfmlWin render window object that we created before