Chapter 18String Localization and Regular Expressions

  • How to localize your applications to reach a worldwide audience
  • How to use regular expressions to do powerful pattern matching

Please note that all the code examples for this chapter are available as a part of this chapter’s code download on the book’s website at on the Download Code tab.

This chapter starts with a discussion of localization, which is becoming more and more important to allow you to write software that can be localized to different regions around the world.

The second part of this chapter introduces the regular expressions library, which makes it easy to perform pattern matching on strings. It allows you to search for sub-strings matching a given pattern, but also to validate, parse, and transform strings. Regular expressions are really powerful and it’s recommended that you start using them instead of manually writing your own string processing code.


When you’re learning how to program in C or C++, it’s useful to think of a character as equivalent to a byte and to treat all characters as members of the ASCII character set (American Standard Code for Information Interchange). ASCII is a 7-bit set usually stored in an 8-bit char type. In reality, experienced C++ programmers recognize that successful programs are used throughout the world. Even if you don’t initially write your program with international audiences ...

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