C

Fundamental concept of Problem solving
Introduction
Problem solving strategies
Program design & implementation
Introduction to C
Introduction to C
How to open C program code window
Description of C code window
Editing File
Saving and Running a program
The components of C language
Structure of C Program
A sample of C language program
C character set and keywords
C character set and keywords
The C character set
Identifiers
Key words
Data Types
Data Types
Primary Data Type
Secondary Data Type
Variables
Introduction
Rules for constructing variables names
Variable declaration
Assigning values to variables
Scope of variables: Local & Global
Constants
Introduction
Character constants
Integer constants
Real constants
Logical & String constants
C instruction set
Introduction
Type Declaration & Input/Output Instructions
Arithmetic Instructions
Control Instructions
Operators
Introduction
Arithmetic operators
Relational operators
Logical operators
Increment & Decrement operators
Bitwise operators
Conditional & ternary operators
The comma operators
Size of operator
Assignment operator
Type modifier
Expressions
Evaluation of expression
Automatic type conversion
Basic Input/Output
Introduction
Console I/O function
Disc & Port I/O function
Control Structures
Sequence control statements
Decision control & conditional statements
Case control statements
Repitition & loop control statements
Some more statements
Array and String
Introduction of Array
Array Declaration
Array Initialization
Two Dimensional Array
Multi Dimensional Array
String
Function and Recursion
Function Definition
Function Declaration
Function Call
Recursion
Pointers
Introduction
Pointer expression
Pointer & functions
Pointer & Array
Multi Dimensional Arrays & Pointer
Arrays of Pointer
Use of Pointer & functions
Structures
Introduction
Giving values to member
Structure Initialization
Comparison of structure variables
Arrays of structures
Arrays within structures
Structures within structures
Passing structure to function
Union
Introduction
Accessing a union member
Initialization of Union variable
Uses of Union
Dynamic Data Structure
Linked list
Stack
Queue
Data File Handling through C
Introduction
File operation
Opening & closing a data file
Creating a data file
Processing a data file
Unformatted data file
C Preprocessor & Macro
Introduction
Macro substitution directives
File inclusion
Compiler control directive
Command line parameter of C
Command line parameter
Header file
Header file
Use of library functions
Some Useful library functions

Array and String


Introduction of Array

Whenever there is need to store a group of data of the same type in the memory, arrays are used. Two terms has been described here Array and String.
 
Strings in C are represented by the array only therefore it would be convenient to describe strings separately in the same block but in the different section.
 
Arrays are the contiguous memory location used to store similar data type or in other terms we can say Arrays are a data structure which holds multiple variables of the same data type.
 
Consider the case where a programmer needs to keep track of a number of people within an organization. So far, our initial attempt will be to create a specific variable for each user.
 
This might look like:
 
int name1 = 101;
int name2 = 232;
int name3 = 231;
 
It becomes increasingly more difficult to keep track of this as the number of variables increases. Arrays offer a solution to this problem.
 
An array is a multi-element box, a bit like a filing cabinet, and uses an indexing system to find each variable stored within it.
 
In C, indexing starts at zero. Arrays, like other variables in C, must be declared before they can be used.
 
The replacement of the above example using arrays looks like:
 
int names[4];
names[0] = 101;
names[1] = 232;
names[2] = 231;
names[3] = 0;
 
We created an array called names, which has space for four integer variables. You may also see that we stored 0 in the last space of the array.
 
This is a common technique used by C programmers to signify the end of an array.
 
An image showing internal stucture and location distribution method of array >