Somewhat related to this, printf alone in a loop is Turing-complete, by using %-directives like that. It was introduced in “Control-Flow Bending: On the Effectiveness of Control-Flow Integrity” (Carlini, et al. 2015) and the authors have implemented Brainfuck and an obfuscated tic-tac-toe with it.

[0]: https://nebelwelt.net/publications/files/15SEC.pdf

[1]: https://github.com/HexHive/printbf

[2]: https://github.com/carlini/printf-tac-toe