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Learn C Programming

You're reading from   Learn C Programming A beginner's guide to learning C programming the easy and disciplined way

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Product type Paperback
Published in Jun 2020
Publisher Packt
ISBN-13 9781789349917
Length 646 pages
Edition 1st Edition
Languages
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Author (1):
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Jeff Szuhay Jeff Szuhay
Author Profile Icon Jeff Szuhay
Jeff Szuhay
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Table of Contents (33) Chapters Close

Preface 1. Section 1: C Fundamentals
2. Running Hello, World! FREE CHAPTER 3. Understanding Program Structure 4. Working with Basic Data Types 5. Using Variables and Assignment 6. Exploring Operators and Expressions 7. Exploring Conditional Program Flow 8. Exploring Loops and Iteration 9. Creating and Using Enumerations 10. Section 2: Complex Data Types
11. Creating and Using Structures 12. Creating Custom Data Types with typedef 13. Working with Arrays 14. Working with Multi-Dimensional Arrays 15. Using Pointers 16. Understanding Arrays and Pointers 17. Working with Strings 18. Creating and Using More Complex Structures 19. Section 3: Memory Manipulation
20. Understanding Memory Allocation and Lifetime 21. Using Dynamic Memory Allocation 22. Section 4: Input and Output
23. Exploring Formatted Output 24. Getting Input from the Command Line 25. Exploring Formatted Input 26. Working with Files 27. Using File Input and File Output 28. Section 5: Building Blocks for Larger Programs
29. Working with Multi-File Programs 30. Understanding Scope 31. Other Books You May Enjoy Appendix

Safer string operations

Sometimes, it is not possible to ensure that a null-terminated array of characters is provided. This is especially common when strings are read from a file, read from the console, or dynamically created in unusual ways. To prevent mayhem, a few string functions have a built-in limiter that only operates on the first N characters of the string array. These are considered safer operations and are described in the following list:

  • Copy and append strings:
    • strncat(): Concatenates two strings. This appends a copy of up to N characters of one null-terminated string to the end of a target null-terminated string, then adds a terminating `\0'character.The target string must have sufficient space to hold theresult.
    • strncpy(): Copies up to N characters of one string to another. Depending on the size of the destination, the destination string may either be filled with the nul characters or may not be null-terminated.
  • Compare strings...
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