What's a game engine and how can I use sfml to make one?

[KasHKoW]

I know that a game engine has components that make a game easier to make. Or a lot of low level or repetitive things done to make the game producing/development a lot easier/faster.

I'm looking for a better definition, sample things that would go into a game engine(descriptive/detailed plz) and how i can use SFML to make one.

As in what would SFMLs job be in the game engine etc.

Thanks

[MorleyDev]

Every game development forum needs this stickied:
Write Games Not Engines

Typically a game engine is what you get when you refactor code out of a game to use in another game. Eventually you get a flexible and reusable code base and tool base.

As for SFML's purpose in games: SFML provides Input, Windows, 2D Rendering, Audio and Networking without having to worry about the OS being compiled for.

[gsaurus]

Check this page on the SFML wiki.