The books I use are mainly as follows:
1. National Computer Rank Examination Level 2 Course: C Language Programming (Version 20 13)
This book is mainly used for self-learning C language. The logical structure of this book is quite good and easy to understand.
2. National Computer Rank Examination Level 2 Course: Public Basic Knowledge (version 20 13) (with examination outline)
Because some of the topics in Level 2 have little to do with C language, they mainly belong to public basic knowledge, which is generally easy to remember, so I recommend this book.
3.(20 14) National Computer Rank Examination must be practiced over the years (including comments on key test sites): Level II C language programming (fourth edition) (with CD attached)
I used 20 13 at that time, and I think the answer is very detailed and easy to understand. It was published by Beiyou Publishing House, and I think the overall quality of the book is very reliable.
4. National Computer Rank Examination Computer Test Database for Future Education: Level II C (applicable to the examination in March C(20 14)) (attached 1 CD) [paperback]
This is mainly about the computer exam. Because computer test questions are usually extracted from the question bank, this book lists all possible programming questions and is very useful.
The above four books can basically cover all the test sites of secondary C language. After reading it, I felt quite relaxed during the exam.