Join Dan Gookin for an in-depth discussion in this video Manipulating single characters, part of Learning C (2014).
- So much goes on with characters that the C library…offers a host of character manipulation functions.…In this movie, I introduce a few of those functions…and show you how to use them in your code.…As a bonus, I offer an introduction to logical expressions,…which can also come into play when working with characters.…In your C code, characters appear either individually…or marching along in an array called a string.…So you can manipulate characters one at a time,…or, more commonly, in the string.…
This code includes a ctype header file…which prototypes the character testing…and manipulation functions.…At lines eight and nine, you see…the 'toupper' and 'tolower' functions.…The 'toupper' function generates…the uppercase version of a letter.…'Tolower' generates the lowercase.…The results are used immediately in the printf functions.…Note that these functions require integer values,…not characters.…So you can display the result…by using %c in the printf function…even though they are integer variables.…
Build and run the code.…
- Understanding a C program
- Adding comments
- Using escape characters
- Working with values and placeholders
- Introducing variables
- Making a decision with if
- Adding functions
- Manipulating strings
- Building arrays
- Nesting structures
Skill Level Beginner
1. Getting Started
2. Programming Basics
3. Program Flow Control
4. Intermediate C Language Concepts
5. Advanced C Language Concepts
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