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

Understanding function parameter scope

Function parameter scope is the same as block scope. The block, in this case, is the function body. Even though the parameters seem to appear outside of the body of the function, they are actually declared and assigned inside the function body when the function is called. Consider the following function:

double decimalSum( double d1 , double d2 )  {
double d3;
d3 = d1 + d2 ;
return d3;

The d1 and d2function parameters are part of the function body and therefore have the block scope of the function. The d3 variable also has the block scope of the function. All of these variables go out of scope when the function returns to its caller.