Book Image

Learn C Programming

By : Jeff Szuhay
Book Image

Learn C Programming

By: Jeff Szuhay

Overview of this book

C is a powerful general-purpose programming language that is excellent for beginners to learn. This book will introduce you to computer programming and software development using C. If you're an experienced developer, this book will help you to become familiar with the C programming language. This C programming book takes you through basic programming concepts and shows you how to implement them in C. Throughout the book, you'll create and run programs that make use of one or more C concepts, such as program structure with functions, data types, and conditional statements. You'll also see how to use looping and iteration, arrays, pointers, and strings. As you make progress, you'll cover code documentation, testing and validation methods, basic input/output, and how to write complete programs in C. By the end of the book, you'll have developed basic programming skills in C, that you can apply to other programming languages and will develop a solid foundation for you to advance as a programmer.
Table of Contents (33 chapters)
Section 1: C Fundamentals
Section 2: Complex Data Types
Section 3: Memory Manipulation
Section 4: Input and Output
Section 5: Building Blocks for Larger Programs

Passing a string to a function

Just as with arrays and pointers, there are a number of ways to pass a string to a function:

  1. The first way is to pass the string explicitly, giving the array size of the string, as follows:
Func1( char[8] aStr );

This parameter declaration allows a string of up to seven characters, as well as the terminating nul character ('\0'), to be passed into Func1(). The compiler will verify that the array being passed in has exactly 8 char elements. This is useful when we are working with strings of limited size.

  1. The next way is to pass the string without specifying the char array size, as follows:
Func2( char[] aStr );
Func3( int size, char[] aStr );

In Func2(), only the string name is passed. Here, we are depending on the fact that there is '\0', a nul character in aStr. To be safer, the size of the string, as well as the string itself, can be passed...