This document discusses endianness and provides an example program to convert between little endian and big endian formats. It defines endianness as the order of bytes in memory, and describes little endian as having the least significant byte at the lowest memory address and big endian as the opposite. An example shows inputting a 2-byte number in little endian format and outputting it in big endian. Pre-requisites of pointers and the objective of understanding endianness representations are also stated.

1. Team Emertxe
Advanced Pointers,
Arrays and Functions

2. Assignment 3

3. Assignment 3

4. Assignment 3
WAP to convert Little Endian data to Big Endian.

5. Assignment 3
WAP to convert Little Endian data to Big Endian.
Input:

6. Assignment 3
WAP to convert Little Endian data to Big Endian.
Input: Read size ‘S’ (in bytes 2 or 4) and read ‘num’ as hexa
(based on ‘S’)

7. Assignment 3
WAP to convert Little Endian data to Big Endian.
Input: Read size ‘S’ (in bytes 2 or 4) and read ‘num’ as hexa
(based on ‘S’)
Output:

8. Assignment 3
WAP to convert Little Endian data to Big Endian.
Input: Read size ‘S’ (in bytes 2 or 4) and read ‘num’ as hexa
(based on ‘S’)
Output: Print ‘num’ in Big endian format.

9. Assignment 3
What is Endianness?

10. Assignment 3
What is Endianness?
 The order or sequence of bytes of a work of digital data in
computer memory.

11. Assignment 3
What is Endianness?
 The order or sequence of bytes of a work of digital data in
computer memory.
 There are two types:

12. Assignment 3
What is Endianness?
 The order or sequence of bytes of a work of digital data in
computer memory.
 There are two types:
1. Little endian

13. Assignment 3
What is Endianness?
 The order or sequence of bytes of a work of digital data in
computer memory.
 There are two types:
1. Little endian
2. Big endian

14. Assignment 3
What is Little Endian?

15. Assignment 3
What is Little Endian?
 The most significant byte stored at the highest address.

16. Assignment 3
What is Little Endian?
 The most significant byte stored at the highest address.
 Example:

17. Assignment 3
What is Little Endian?
 The most significant byte stored at the highest address.
 Example:
num = 0x12345678;

18. Assignment 3
What is Little Endian?
 The most significant byte stored at the highest address.
 Example:
num = 0x12345678; 78 56 34 12
100 101 102 103

19. Assignment 3
What is Big Endian?

20. Assignment 3
What is Big Endian?
 The most significant byte stored at the lowest address.

21. Assignment 3
What is Big Endian?
 The most significant byte stored at the lowest address.
 Example:

22. Assignment 3
What is Big Endian?
 The most significant byte stored at the lowest address.
 Example:
num = 0x12345678;

23. Assignment 3
What is Big Endian?
 The most significant byte stored at the lowest address.
 Example:
num = 0x12345678; 12 34 56 78
100 101 102 103

24. Assignment 3
Example :-

25. Assignment 3
Example :-
Input:

26. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD

27. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD CD AB
100 101

28. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD
Output:
CD AB
100 101

29. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD
Output: 0xCDAB
CD AB
100 101

30. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD
Output: 0xCDAB
Input: S = 2 , num = 0x1234
CD AB
100 101

31. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD
Output: 0xCDAB
Input: S = 2 , num = 0x1234
CD AB
100 101
34 12
200 201

32. Assignment 3
Example :-
Input: S = 2 , num = 0xABCD
Output: 0xCDAB
Input: S = 2 , num = 0x1234
Output: 0x3412
CD AB
100 101
34 12
200 201

33. Sample execution:-
Assignment 3

34. Sample execution:-
Assignment 3

35. Sample execution:-
Assignment 3

36. Assignment 3
Pre-requisites:-

37. Assignment 3
Pre-requisites:-
 Pointers

38. Assignment 3
Pre-requisites:-
 Pointers
Objective:-

39. Assignment 3
Pre-requisites:-
 Pointers
Objective:-
 To understand the concept of Big Endian and Little Endian
representation.

40. Team Emertxe
Thank you