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 unconditional branching – the dos and (mostly) don'ts of goto

The goto statement is an immediate and unconditional transfer of program execution to the specified label within a function block. goto causes execution to jump to the label. In current C, unlike the bad old days, goto may not jump out of a function block, and so it may neither jump out of one function into the middle of another nor out of one program into another program (neither were uncommon in those days).

The goto statement consists of two parts. First, there must be a label declared either as a standalone statement, as follows—label_identifier :—or as a prefix to any other statement, like so: label_identifier : statement.

And secondly, there must be the gotostatement to that label_identifier. The syntax for the goto statement is as follows:

goto label_identifier;

The reason for thegoto statement being shunned comes from the bad old days...