Defining a Structure

Introduction Generations of Computers Classification of Computers Basic Anatomy of a Computer System Memory Management Computer Software Operating System

Algorithm Flowcharts

Programming Language Generations of Programming Languages Introduction to C Structure of C Programming Language Integrated Development Environment First C program, Hello World Executing a C Program Constants in C Variables in C C Storage Classes and Storage Class Specifiers

Introduction Arithmetic operators Relational Operators Logical Operators Assignment Operator Increment and Decrement Operators Conditional Operators Bitwise Operators Precedence and Associativity

Control Instructions in C if Statement in C if-else Statement Nested if-else statement else if ladder Switch Statements in C

Loops Introduction for Loop while loop in C do-while Loop break and continue statements

Array in C One Dimensional array Two Dimensional Array Multidimensional Arrays

Modular Programming Functions

Searching Techniques Linear Search Algorithm Binary-Search-Algorithm

Sorting Introduction Bubble Sort

What is Strings Standard Library String Functions

Structure Introduction Defining a Structure Declaration of Structure Example of Structure Union Introduction Defining a Union Accessing Union Members

Pointers in C Accessing the Address of a variable Pointer Operations

Dynamic Memory Allocation

Structures must be defined first for their format which may be used later to declare structure variables.

The general format of a structure definition is as follows:

struct tag_name
{
data_type member1;
data_type member2;
};

Example:

Let us use an example to illustrate the process of structure definition and the creation of structure variables. Consider a student detail consisting of name, address, and pin. We can define a structure to hold this information as follows

struct student
{
char name[50];
char address[50];
int pin;
};

The keyword struct declares a structure that will store the information for three data fields: name, address, and pin. These fields are called structure elements or members. Each member may belong to a different type of data. student is the name of the structure and is called the structure tag. The tag name may be used subsequently to declare variables that have the tag's structure.

Note that the above definition has not declared any variables. It simply describes a format called template to represent information as shown below:

name array of 50 characters

address array of 50 characters

pin integer

Fundamentals of the Computer System

Introduction to Algorithm

Programming Basics

Operators in C

Conditional Branching

Iteration and Loops

Array in C

Functions in C

Searching Algorithms

Sorting Algorithms

Strings

Structures and Union

Pointers in C

File Handling in C

Advanced

Defining a Structure

Example: