Book Image

Extreme C

By : Kamran Amini
5 (1)
Book Image

Extreme C

5 (1)
By: Kamran Amini

Overview of this book

There’s a lot more to C than knowing the language syntax. The industry looks for developers with a rigorous, scientific understanding of the principles and practices. Extreme C will teach you to use C’s advanced low-level power to write effective, efficient systems. This intensive, practical guide will help you become an expert C programmer. Building on your existing C knowledge, you will master preprocessor directives, macros, conditional compilation, pointers, and much more. You will gain new insight into algorithm design, functions, and structures. You will discover how C helps you squeeze maximum performance out of critical, resource-constrained applications. C still plays a critical role in 21st-century programming, remaining the core language for precision engineering, aviations, space research, and more. This book shows how C works with Unix, how to implement OO principles in C, and fully covers multi-processing. In Extreme C, Amini encourages you to think, question, apply, and experiment for yourself. The book is essential for anybody who wants to take their C to the next level.
Table of Contents (23 chapters)

Unit testing

As we explained in the previous section, as part of unit testing, we test isolated units and a unit can be as small as a function or as big as a component. In C, it can be a function or a whole component written in C. The same discussion can be applied to C++ as well, but there we can have other units like classes.

The most important thing about unit testing is that units should be tested in isolation. For example, if the target function depends on the output of another function, we need to find a way to test the target function in isolation. We are going to explain this using a real example.

Example 22.1 prints the factorials of even numbers less than 10, but not in the usual way. The code is well-organized in one header and two source files. The example is about two functions; one of them generates the even numbers less than 10 and the other function receives a function pointer and uses it as a source for reading an integer number, and finally calculates...