This was originally a port of my HTML5 canvas version here. If you just want to learn basic floor/ceiling texture mapping in a raycaster, I recommend studying the HTML5 version. The code is easier to read and can be run in your browser.
This C++ project has a few more features compared to the HTML5 version: vertical movement, wall top/bottom texture mapping, sprites and projectiles. There is also experimental support for thin angled walls and slopes.
You can see videos of it in action here.
Download the Windows demo here.
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I highly recommending compiling with some kind of optimization enabled. For Dev-C++ I use the -O2 flag. The -O3 flag also works if -fno-tree-vectorize is specified as well.
You will need SDL2 and SDL2_mixer.
SDL2 version used is SDL2-devel-2.0.12-mingw.tar.gz
https://www.libsdl.org/download-2.0.php
SDL2_mixer version used is SDL2_mixer-devel-2.0.4-mingw.tar.gz
https://www.libsdl.org/projects/SDL_mixer/
So far I've only tested this with Dev-C++ 5.11
https://sourceforge.net/projects/orwelldevcpp/
Sounds and images are from these OpenGameArt links:
https://opengameart.org/content/big-pack-of-hand-painted-tiling-textures
https://opengameart.org/content/first-person-dungeon-crawl-protagonist
https://opengameart.org/content/lab-sprites
https://opengameart.org/content/first-person-dungeon-crawl-art-pack
https://opengameart.org/content/2-high-quality-explosions
https://opengameart.org/content/4-projectile-launches
https://opengameart.org/content/lpc-animated-doors