Difference between revisions of "Advance-C/C2/Union-and-Typedef/English-timed"

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(Created page with " {| Border=1 ! <center>Time</center> ! <center>Narration</center> |- | 00:01 | Welcome to the Spoken Tutorial on''' Typedef and Union in C.''' |- | 00:07 | In this tutorial,...")
 
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|-
 
|-
 
| 00:01
 
| 00:01
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| Welcome to the Spoken Tutorial on''' Typedef and Union in C.'''
+
| Welcome to the '''Spoken Tutorial''' on''' Typedef and Union in C.'''
  
 
|-
 
|-
 
| 00:07
 
| 00:07
−
| In this tutorial, we will learn about   
+
| In this tutorial, we will learn about:  
  
 
* '''typedef keyword'''
 
* '''typedef keyword'''
 
* '''union keyword'''  
 
* '''union keyword'''  
−
* with the help of some examples.
+
with the help of some examples.
  
 
|-
 
|-
 
| 00:17
 
| 00:17
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| For this tutorial I am using '''Ubuntu''' Operating System version 11.10. '''gcc compiler''' version 4.6.1 on '''Ubuntu'''
+
| For this tutorial, I am using:
 +
* '''Ubuntu''' Operating System version 11.10.  
 +
* '''gcc compiler''' version 4.6.1 on '''Ubuntu'''.
  
 
|-
 
|-
 
|00:29
 
|00:29
−
| To follow this tutorial, you should be familiar with C tutorials.
+
| To follow this tutorial, you should be familiar with 'C' tutorials.
  
 
|-
 
|-
 
| 00:36
 
| 00:36
−
|If not, for relevant tutorials please visit our website which is as shown.
+
|If not, for relevant tutorials, please visit our website which is as shown.
  
 
|-
 
|-
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|-
 
|-
 
| 01:28
 
| 01:28
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| Note that our filename is '''pallindrome.c'''
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| Note that our filename is ''''pallindrome.c''''.
  
 
|-
 
|-
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|-
 
|-
 
| 01:41
 
| 01:41
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| We have given '''alias '''name as '''uint '''to the''' unsigned int datatype '''using''' typedef''' keyword.
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| We have given '''alias '''name as 'uint' to the''' unsigned int datatype '''using''' typedef''' keyword.
  
 
|-
 
|-
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|-
 
|-
 
| 02:03
 
| 02:03
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| Now let us execute the program.
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| Now, let us execute the program.
  
 
|-
 
|-
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|-
 
|-
 
| 02:16
 
| 02:16
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| Type ''' gcc space pallindrome dot c  space hyphen o space pallindrome'''. Press '''Enter'''.
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| Type: ''' gcc space pallindrome dot c  space hyphen o space pallindrome'''. Press '''Enter'''.
  
 
|-
 
|-
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|-
 
|-
 
|02:34
 
|02:34
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| We see: '''Enter any three digit number'''
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| We see: '''"Enter any three digit number"'''.
  
 
|-
 
|-
 
| 02:38
 
| 02:38
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| I will enter ''' 121'''
+
| I will enter ''' 121'''.
  
 
|-
 
|-
 
| 02:42
 
| 02:42
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| The output is: '''Given number is a palindrome number'''
+
| The output is: '''"Given number is a palindrome number".'''
  
 
|-
 
|-
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|-
 
|-
 
| 03:08
 
| 03:08
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| '''Syntax1:'''
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| Syntax1:
 
'''union union_name''' within curly brackets '''members;''' after curly brackets '''union_variable'''
 
'''union union_name''' within curly brackets '''members;''' after curly brackets '''union_variable'''
−
and a '''semi-colon'''.
+
and a semicolon.
  
 
|-
 
|-
 
| 03:21
 
| 03:21
 
| We also have an alternate syntax.
 
| We also have an alternate syntax.
−
'''Syntax 2:''' '''union union_name''' within curly brackets '''members;''' after curly brackets '''semi-colon''' '''union union_name union_variable;'''
+
Syntax 2:
 +
'''union union_name''' within curly brackets '''members;''' after curly brackets semicolon '''union union_name union_variable;'''
  
 
|-
 
|-
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|-
 
|-
 
| 03:47
 
| 03:47
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| Note that our filename is '''union dot c'''
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| Note that our filename is "union dot c".
  
 
|-
 
|-
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|-
 
|-
 
| 03:56
 
| 03:56
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| Here we have three variables '''english''', '''maths''' and''' science.'''
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| Here we have three variables- '''english''', '''maths''' and''' science.'''
  
 
|-
 
|-
 
|04:02
 
|04:02
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| In '''main function''', we have declared a '''union''' variable as '''stud.'''
+
| In '''main()''' function, we have declared a '''union''' variable as '''stud.'''
  
 
|-
 
|-
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|-
 
|-
 
| 04:26
 
| 04:26
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| Let us execute. On the '''terminal''', type, '''gcc space union dot c space hyphen o space union'''
+
| Let us execute. On the '''terminal''', type: '''gcc space union dot c space hyphen o space union'''
−
Type '''dot slash union'''
+
Type: '''dot slash union'''
  
 
|-
 
|-
 
|04:44
 
|04:44
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| The output is displayed as: '''Total is 228'''
+
| The output is displayed as: '''"Total is 228"'''.
  
 
|-
 
|-
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|-
 
|-
 
| 05:07
 
| 05:07
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| '''Union''' occupies lower memory space.
+
| '''Union''' occupies lower '''memory space'''.
  
 
|-
 
|-
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|-
 
|-
 
| 05:27
 
| 05:27
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| Memory allocation for '''union''' variable will be''' 8 bytes.'''
+
| '''Memory''' allocation for '''union''' variable will be''' 8 bytes.'''
  
−
As '''double datatype''' will occupy the maximum memory space.
+
As '''double datatype''' will occupy the maximum '''memory space'''.
  
 
|-
 
|-
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|-
 
|-
 
| 05:48
 
| 05:48
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| Memory allocation for structure variable will be: '''2bytes+6bytes+8bytes =16bytes.'''
+
| '''Memory''' allocation for '''structure''' variable will be: '''2bytes+6bytes+8bytes =16bytes.'''
  
 
|-
 
|-
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|-
 
|-
 
| 06:06
 
| 06:06
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| In this tutorial we learnt,
+
| In this tutorial, we learnt:
  
 
* '''typedef '''
 
* '''typedef '''
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|-
 
|-
 
| 06:17
 
| 06:17
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| Write a program to display records of an employee.
+
| write a program to display records of an employee.
  
 
|-
 
|-
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|-
 
|-
 
| 06:29
 
| 06:29
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| Give an alias name as emp using '''typedef.'''
+
| Give an '''alias''' name as '''emp''' using '''typedef.'''
  
 
|-
 
|-
 
|06:35
 
|06:35
−
| Watch the video available at the link shown below
+
| Watch the video available at the link shown below.
  
 
|-
 
|-
 
| 06:39
 
| 06:39
−
| It summarises the Spoken Tutorial project  
+
| It summarizes the Spoken Tutorial project.
  
 
|-
 
|-
 
| 06:42
 
| 06:42
−
| If you do not have good bandwidth, you can download and watch it
+
| If you do not have good bandwidth, you can download and watch it.
  
 
|-
 
|-
 
| 06:47
 
| 06:47
−
| The Spoken Tutorial Project Team , Conducts workshops using spoken tutorials  
+
| The Spoken Tutorial project team: * Conducts workshops using spoken tutorials.
  
 
|-
 
|-
 
| 06:53
 
| 06:53
−
| Gives certificates to those who pass an online test. For more details, please write to contact@spoken-tutorial.org
+
|* Gives certificates to those who pass an online test. For more details, please write to contact@spoken-tutorial.org
  
 
|-
 
|-
 
| 07:04
 
| 07:04
−
| Spoken Tutorial Project is a part of the Talk to a Teacher project
+
| '''Spoken Tutorial''' Project is a part of the '''Talk to a Teacher''' project.
  
 
|-
 
|-
 
| 07:08
 
| 07:08
−
| It is supported by the National Mission on Education through ICT, MHRD, Government of India
+
| It is supported by the National Mission on Education through ICT, MHRD, Government of India.
  
 
|-
 
|-
 
| 07:16
 
| 07:16
−
| More information on this Mission is available at: http://spoken-tutorial.org\NMEICT-Intro
+
| More information on this mission is available at:
 +
http://spoken-tutorial.org\NMEICT-Intro
  
 
|-
 
|-
 
| 07:22
 
| 07:22
 
| This is Ashwini Patil from IIT Bombay.
 
| This is Ashwini Patil from IIT Bombay.
−
 
 
Thank you for joining.
 
Thank you for joining.
  
 
|}
 
|}

Revision as of 12:49, 3 December 2015

Time
Narration
00:01 Welcome to the Spoken Tutorial on Typedef and Union in C.
00:07 In this tutorial, we will learn about:
  • typedef keyword
  • union keyword

with the help of some examples.

00:17 For this tutorial, I am using:
  • Ubuntu Operating System version 11.10.
  • gcc compiler version 4.6.1 on Ubuntu.
00:29 To follow this tutorial, you should be familiar with 'C' tutorials.
00:36 If not, for relevant tutorials, please visit our website which is as shown.
00:43 I will start with an introduction to typedef keyword.
00:49 Typedef keyword is used to give symbolic name to an existing type or user-defined datatypes.
00:58 It is a way to define alias to the commands.
01:03 It helps to provide clarity to the code.
01:07 It makes the code easier to understand and change.
01:12 Syntax: typedef existing_name alias_name. Example: typedef unsigned int uint;
01:24 Let us go through an example code.
01:28 Note that our filename is 'pallindrome.c'.
01:34 In this program, we will check whether the given number is a pallindrome or not.
01:41 We have given alias name as 'uint' to the unsigned int datatype using typedef keyword.
01:52 Here we are using uint to declare the variables.
01:59 This is the logic for pallindrome.
02:03 Now, let us execute the program.
02:06 Open the terminal by pressing Ctrl+Alt+T keys simultaneously on your keyboard.
02:16 Type: gcc space pallindrome dot c space hyphen o space pallindrome. Press Enter.
02:29 Type: dot slash pallindrome
02:34 We see: "Enter any three digit number".
02:38 I will enter 121.
02:42 The output is: "Given number is a palindrome number".
02:47 Now we will learn about union datatype.
02:52 Union is a collection of different datatypes grouped together.
02:57 Union allocates one common storage space for all its members.
03:03 We can access only one member of union at a time.
03:08 Syntax1:

union union_name within curly brackets members; after curly brackets union_variable and a semicolon.

03:21 We also have an alternate syntax.

Syntax 2: union union_name within curly brackets members; after curly brackets semicolon union union_name union_variable;

03:39 Let us see an example.
03:41 I have a code file; let us go through it.
03:47 Note that our filename is "union dot c".
03:52 We have declared union named student.
03:56 Here we have three variables- english, maths and science.
04:02 In main() function, we have declared a union variable as stud.
04:09 Here we can access the union members using a union variable:
  • stud dot english
  • stud dot maths
  • stud dot science
04:21 Then we calculate the total marks and display it.
04:26 Let us execute. On the terminal, type: gcc space union dot c space hyphen o space union

Type: dot slash union

04:44 The output is displayed as: "Total is 228".
04:50 Let us see the difference between structure and union.
04:55 Union allocates a common storage space for all its members.
05:01 Structure allocates separate storage space for all its members.
05:07 Union occupies lower memory space.
05:11 Structure occupies higher memory space.
05:14 Example for union:

union student{int marks;char name[6];double average;};

05:27 Memory allocation for union variable will be 8 bytes.

As double datatype will occupy the maximum memory space.

05:39 Exampls for structure:

struct student{int mark;char name[6];double average;};

05:48 Memory allocation for structure variable will be: 2bytes+6bytes+8bytes =16bytes.
06:00 This brings us to the end of this tutorial.
06:04 Let us summarize.
06:06 In this tutorial, we learnt:
  • typedef
  • union
  • Difference between union and structure.
06:14 As an assignment,
06:17 write a program to display records of an employee.
06:21 Like name, address, salary.
06:25 Define a union named employee.
06:29 Give an alias name as emp using typedef.
06:35 Watch the video available at the link shown below.
06:39 It summarizes the Spoken Tutorial project.
06:42 If you do not have good bandwidth, you can download and watch it.
06:47 The Spoken Tutorial project team: * Conducts workshops using spoken tutorials.
06:53 * Gives certificates to those who pass an online test. For more details, please write to contact@spoken-tutorial.org
07:04 Spoken Tutorial Project is a part of the Talk to a Teacher project.
07:08 It is supported by the National Mission on Education through ICT, MHRD, Government of India.
07:16 More information on this mission is available at:

http://spoken-tutorial.org\NMEICT-Intro

07:22 This is Ashwini Patil from IIT Bombay.

Thank you for joining.

Contributors and Content Editors

PoojaMoolya, Pratik kamble, Sandhya.np14

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