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

Assignment by the function return value

A function is a statement that can return the result of its execution to its caller. When the function has a data type that is not void, the function is replaced by its returned value, which can then be assigned to a variable of a compatible type.

The returned value may be explicitly assigned to a variable or it may be implicitly used within a statement and discarded at the completion of the statement.

Consider theinchesToFeet()function declaration and definition:

#include <stdio.h>

double inchesToFeet( double );

int main( void )
double inches = 1024.0;
double feet = 0.0;
feet = inchesToFeet( inches );
printf( "%12.3g inches is equal to %12.3g feet\n" , inches , feet );
return 0;

// Given inches, convert this to feet
double inchesToFeet( double someInches)
double someFeet = someInches / 12.0;
return someFeet;

In this function, we focus on the assignment that occurs at the return...