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

Using functions that operate on arrays

An array is a collection of variables bound together by a common name and an offset. In nearly every respect, we can treat an individual element of an array just as we would any other variable. Even with function parameters, array elements can be passed into them as with regular variables, as follows:

#include <math.h>
int anArray[10] = {0};

anArray[3] = 5;
anArray[3] = pow( anArray[3] , 2 );

The fourth element of the array is assigned a value of 5. The function declared in math.h, pow(), is called with the value found in the fourth element of the array and is raised to the power of 2 (squared) and assigned back to the fourth element of the array, which now has a value of 25.

We want to create functions that operate on all elements of an array, regardless of their size. But how do we use arrays of unknown sizes as parameters to functions? We can do this; arrays of unknown sizes can be passed as arguments to functions...