Programming in C, 2nd Edition

13

Structure and Union

Chapter Outline

13.1 Introduction

13.2 Features of Structures

13.3 Declaration and Initialization of Structures

13.4 Structure Within Structure

13.5 Array of Structures

13.6 Pointer to Structure

13.7 Structure and Functions

13.8 typedef

13.9 Bit Fields

13.10 Enumerated Data Type

13.11 Union

13.12 Calling BIOS and DOS Services

13.13 Union of Structures

13.1 INTRODUCTION

You know that a variable stores a single value of a data type. Arrays can store many values of a similar data type. Data in the array is of the same composition in nature as far as the type is concerned. In real life, we need to have different data types; for example, to maintain employees’ information we should have information such as name, age, qualification, ...