Computer Programming and IT

Chapter 10

Storage Class

CHAPTER OUTLINE

10.1 Introduction

10.2 Scope of a Variable

10.3 Automatic Variables

10.4 External Variables

10.5 Static Variables

10.6 Register Variables

10.1 INTRODUCTION

The variables declared in C programs are totally different from other languages. We can use the same variable names in the C program in separate blocks. When we declare a variable, it is available only to specific part or block of the program. Remaining block or other function cannot access to the variable. The area or block of the C program from where the variable can be accessed is known as the Scope of variable. The area or scope of the variable depends on its storage class, that is, where and how it is declared. There are four scope variables: ...