Arrays in C are collections of similar data types stored in contiguous memory locations that can be accessed via indexes, they can be declared with a specified data type and size and initialized with values, and multi-dimensional arrays allow the storage of two-dimensional data structures like matrices through multiple subscripts denoting rows and columns.
This is a presentation on Arrays, one of the most important topics on Data Structures and algorithms. Anyone who is new to DSA or wants to have a theoretical understanding of the same can refer to it :D
An array is a very important derived data type in the C programming language. This presentation contains basic things about arrays like definition, initialization, their types, and examples.
This is a presentation on Arrays, one of the most important topics on Data Structures and algorithms. Anyone who is new to DSA or wants to have a theoretical understanding of the same can refer to it :D
An array is a very important derived data type in the C programming language. This presentation contains basic things about arrays like definition, initialization, their types, and examples.
Introduction of arrays, Declaration of array, Initialization of array, Sorting, Multidimensional array. Some code examples that will make you clear about the concept of arrays.
https://github.com/ashim888/csit-c
Array
Introduction
One-dimensional array
Multidimensional array
Advantage of Array
Write a C program using arrays that produces the multiplication of two matrices.
The Array is the most commonly used Data Structure.
An array is a collection of data elements that are of the same type (e.g., a collection of integers, collection of characters, collection of doubles).
OR
Array is a data structure that represents a collection of the same types of data.
The values held in an array are called array elements
An array stores multiple values of the same type – the element type
The element type can be a primitive type or an object reference
Therefore, we can create an array of integers, an array of characters, an array of String objects, an array of Coin objects, etc.
At the end of this lecture students should be able to;
Describe the C arrays.
Practice the declaration, initialization and access linear arrays.
Practice the declaration, initialization and access two dimensional arrays.
Apply taught concepts for writing programs.
Introduction of arrays, Declaration of array, Initialization of array, Sorting, Multidimensional array. Some code examples that will make you clear about the concept of arrays.
https://github.com/ashim888/csit-c
Array
Introduction
One-dimensional array
Multidimensional array
Advantage of Array
Write a C program using arrays that produces the multiplication of two matrices.
The Array is the most commonly used Data Structure.
An array is a collection of data elements that are of the same type (e.g., a collection of integers, collection of characters, collection of doubles).
OR
Array is a data structure that represents a collection of the same types of data.
The values held in an array are called array elements
An array stores multiple values of the same type – the element type
The element type can be a primitive type or an object reference
Therefore, we can create an array of integers, an array of characters, an array of String objects, an array of Coin objects, etc.
At the end of this lecture students should be able to;
Describe the C arrays.
Practice the declaration, initialization and access linear arrays.
Practice the declaration, initialization and access two dimensional arrays.
Apply taught concepts for writing programs.
COURSE TITLE: SOFTWARE DEVELOPMENT VI
COURSE CODE: VIT 351
TOPICS COVERED:
ARRAYS
TYPES OF ARRAYS
MULTIDIMENSIONAL ARRAYS
CHARACTER HANDLING IN C
STRING HANDLING IN C
QUIZ SET 2
Esoft Metro Campus - Certificate in c / c++ programmingRasan Samarasinghe
Esoft Metro Campus - Certificate in java basics
(Template - Virtusa Corporate)
Contents:
Structure of a program
Variables & Data types
Constants
Operators
Basic Input/output
Control Structures
Functions
Arrays
Character Sequences
Pointers and Dynamic Memory
Unions
Other Data Types
Input/output with files
Searching
Sorting
Introduction to data structures
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Session 4
1. ARRAY in C
• Array is a collection or group of similar data type
elements stored in contiguous memory.
• The individual data items can be characters, integers,
floating points numbers and so on .
• Here contiguous memory allocation means array
occupies contiguous bytes as needed in the memory.
2. Declaring single dimension Arrays
• We can declare an array by specify its data
type, name and the number of elements the
array holds between square brackets
immediately following the array name.
• Here is the syntax:
data_type array_name[size];
3. Declaring single dimension Array
• For example, to declare an integer array which
contains 10 elements we can do as follows:
int values[10];
4. Accessing Single Dimension Array
• We can access array elements via
indexes array_name[index]. Indexes of array
starts from 0
• With each subscript enclosed in square
brackets.
• For example,
values[0]=5;
values[1]=10;
printf(“%d”,values[1]);
5. Initializing Arrays
• It is like a variable, an array can be initialized.
• To initialize an array, you provide initializing
values which are enclosed within curly braces
in the declaration and placed following an
equals sign after the array name.
• Here is an example of initializing an integer
array.
int list[5] = {2,1,3,7,8};
6. Multi dimensional Arrays:
• Often there is a need to store and manipulate
two dimensional data structure such as matrices
& tables.
• Here the array has two subscripts. One subscript
denotes the row & the other the column.
• The declaration of two dimension arrays is as
follows:
data_type array_name[row_size][column_size];
int m[10][20];
8. Accessing two dimensional arrays
int values[2][2];
values[0][0]=1; values[0][1]=2;
values[1][0]=3; values[1][1]=4;
int num[2][2]={1,2,3,4};
int matrix[3][3]
={{11,12,13}, {21,22,23}, {32,31,33}};
9. ARRAY AND STRINGS
• The gets and puts functions:
• The gets and puts functions facilitate the transfer
of strings between the computer and the
standard input/output devices.
• Each of these functions accepts a single
argument. The argument must be a data item
that represents a string(e.g. character array).
10. Example of using gets and puts
#include<stdio.h>
void main()
{
char inne[80];
gets(line);
puts(line);
}
The gets and puts functions offer simple
alternatives to the use of scanf and printf for
reading and displaying strings
11. String library functions
• strlen()
• This function counts a number of characters
present in a string while giving a call to the
function.
char msg[] = “Lord krishna”;
int n;
n=strlen(msg);
printf(“length of string =%d”, n);
12. String library functions
• strcpy()
• This function copies the contents of one string
to another.
• The base address of source and target strings
are supplied to the function.
char source[] = “Lord Krishna”;
char target[15];
strcpy(target, source);
printf(“Source string is : %s”, source);
printf(“target string is :%s”,target);
13. String library functions
• strcat()
• This function concatenates the source string
at the end of target sting.
char s[] = “Lord”;
char t[] = “Krishna”;
strcat(t,s);
printf(“source string is %sn”, s);
printf(“target stirng is %sn”, t);
14. String library functions
• strcmp()
• This function compares two strings and
returns some integer value.
• If both the strings are equal then it returns 0
otherwise it returns some other integer value.
void main()
{
char s1[]=”Jerry”; char s2[]=”Ferry”;
int j= strcmp(s1, s2);
printf(“%d”, j);
15. Understanding Functions
• What is Function?
• A function in C language is a block of code that
performs a specific task.
• It is reusable i.e. it can be executed from as
many different parts in a C Program as
required.
• It also optionally returns a value to the calling
program
16. Structure of a Function
<return type> FunctionName (Argument1,
Argument2, Argument3……)
{
Statement1;
Statement2;
}
int sum (int x, int y)
{
int result;
result = x + y;
return (result);
}
17. Types of functions:
A function may belong to any one of the
following categories:
• Functions with no arguments and no return
values.
• Functions with arguments and no return values.
• Functions with arguments and return values.
• Functions that return multiple values.
• Functions with no arguments and return values.
18. Advantages of using functions:
• It makes possible top down modular
programming.
• The length of the source program can be
reduced.
• It becomes uncomplicated to locate and
separate a faulty function for further study.
• c programmer can use function written by
others, instead of starting over from scratch.
21. Function Which Return Values
#include <stdio.h>
int add (int x,int y)
{
int result; result=x+y;
return(result);
}
void main ()
{
int total;
total=add(10,12);
22. Recursive Function
• Recursive function is a function which
contains a call to itself.
• Recursive function allows you to divide your
complex problem into identical single simple
cases which can handle easily.
• This is also a well-known computer
programming technique: divide and conquer.
23. Example of recursive function
# include<stdio.h>
int factorial(int number)
{
if(number <= 1)
return 1;
return number * factorial(number - 1);
}
void main()
{
int x = 5;
printf("factorial of %d is %d",x,factorial(x));
}
24. Scope Rule of Functions
void main( )
{
int i = 20 ;
display ( i ) ;
}
void display ( int j )
{
int k = 35 ;
printf ( "n%d", j ) ;
printf ( "n%d", k ) ;
}