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

Initializing arrays of two dimensions

We can initialize array2D at the declaration stage in several ways, as follows:

int array2D[4][5] = {0};

array2D is initialized with all of its elements set to 0. Note that we cannot use our constant sizes to initialize the array at declaration. Try it and see what error message you get.

To give each element a different value at the declaration stage, we would initialize it as follows:

int array2D[size2D][size1D] = { {11 , 12 , 13 , 14 , 15 } ,
{21 , 22 , 23 , 24 , 25 } ,
{31 , 32 , 33 , 34 , 35 } ,
{41 , 42 , 43 , 44 , 45 ) };

In this declaration, the first row of elements is given the 11..15values, and the second row is given the 21..25values. Notice how the initialization of the array in this manner closely matches our conceptualization of a two-dimensional array earlier in this chapter.