Your Fifth Day in C (Understanding C Strings) - Crash Course in C Programming

Published: 30 January 2022
on channel: Mike Shah

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►C Programming playlist:    • C Programming Series
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►Lesson Description: In this series of lessons I provide you with a crash course in the C programming language. In this lesson I will discuss how strings are represented in the C language. In addition, I'll also talk about the difference between a C string and a String literal. Throughout this discussion we will learn about some of the important C library string functions, implement two of them from scratch (strlen and strcat), and then wrap up discussion showing why it is important to have a null terminating byte your C strings.

00:00 Introduction
00:47 C-strings are an array of characters
01:58 The Null terminating byte
3:33 Modifying characters in the C-string (i.e. character array)
5:40 Exercise: Writing a string length function
8:20 The strlen function in string.h
9:30 'const' in C
10:58 size_t datatype in C
12:35 Working with a dynamically allocated string with malloc (i.e. char*)
14:55 String Literals in C
16:30 C puts in the null terminator for string literals
17:03 String literals are read-only
21:52 Exercise: Writing a string append function
31:57 Bug fixes and a refresher on pass-by-value
34:55 A working ''StringAppend'' function demo
35:34 Comparing our StringAppend with strcat in C Standard Library\
36:36 Refactoring our StringAppend
40:05 Simplifying our StringAppend with realloc
44:45 Improving our StringAppend performance with memcpy
47:20 What happens without the Null Byte?
50:20 Review on temporary, stack allocated memory
52:03 Wrap up and Conclusion

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