Learning Objective-C 2.0: A Hands-on Guide to Objective-C for Mac and iOS Developers, Second Edition

1. C, the Foundation of Objective-C

Objective-C is an extension of C. Most of this book concentrates on what Objective-C adds to C. But in order to program in Objective-C, you have to know the basics of C. When you do such mundane things as add two numbers together, put a comment in your code, or use an if statement, you do them the identical way in both C and Objective-C. The non-object part of Objective-C isn’t similar to C, or C-like, it is C. Objective-C 2.0 is currently based on the C99 standard for C.

This chapter begins a two-chapter review of C. The review isn’t a complete description of C; it covers only the basic parts of the language. Topics such as bit operators, the details of type conversion, Unicode characters, macros with arguments, ...