C tutorials

The C Book
https://publications.gbdirect.co.uk/c_book/
Learn C programming
https://www.wscubetech.com/resources/c-programming
C Tutorial
https://www.cprogramming.com/tutorial/c-tutorial.html
C Tutorial
https://www.scaler.com/topics/c/
C programming language
https://www.tutorialgateway.org/c-programming/
Learn C Programming from Scratch
https://www.learnc.net