1, Introduction to the Classics of C Language (5th Edition): a book published by Tsinghua University Publishing House in 20 13, by Ivor Horton. The fifth edition is the latest edition, which combines the author's years of programming experience, giving people a simple feeling and suitable for beginners.

2.C Language Programming: A Comprehensive Course of C Language Introduction (Third Edition): This book is a classic textbook of C language introduction, and the first edition has been published for 20 years. The content of this book is detailed and comprehensive, from shallow to deep, with rich examples, and some exercises are attached to each chapter, which is very suitable for readers to use by themselves.

3, "C language from entry to mastery": for the purpose of zero-based explanation, use examples to guide readers to learn in a simple way.