Connect Four was a multi-language project. I implemented the game Connect Four using standard text I/O in several languages. Similar to the Rosetta Code project, the goal was to make the same thing in many languages to see the differences between how the languages operate, and how large or small each codebase was.
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This is from the C implementation of Connect Four, for Windows. It uses the windows console API to switch the command prompt from OEM to Utf-8, checks that the user's console font supports Utf-8, and then uses the Box Drawing characters to draw the grid.