Difference between revisions of "C-and-C++/C3/Arrays/English-timed"

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| 00.01
 
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|Welcome to the spoken-tutorial on Arrays in C and C++.
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|Welcome to the spoken-tutorial on '''Arrays''' in '''C''' and '''C++.'''
  
 
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| 00.09
 
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|What is an array.
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|What is an '''array.'''
  
 
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| 00.11
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|Declaration of an array.  
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|Declaration of an '''array. '''
  
 
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| 00.13
 
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|Initialization of an array.  
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|Initialization of an '''array. '''
  
 
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|Ubuntu Operating System version 11.04  
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|'''Ubuntu Operating System''' version 11.04  
  
 
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|00.30
 
|00.30
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| gcc and g++ Compiler version 4.6.1 .
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| '''gcc''' and '''g++ Compiler''' version 4.6.1 .
  
  
 
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|00.36
 
|00.36
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|Let us start with the introduction to Array.
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|Let us start with the introduction to '''Array.'''
  
 
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|00.39
 
|00.39
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|Array is the collection of data or elements of same data-type.  
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|'''Array''' is the collection of data or elements of same data-type.  
  
 
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| 00.44
 
| 00.44
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|Array index starts from 0.  
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|'''Array''' index starts from 0.  
  
 
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|Single dimensional array.  
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|'''Single dimensional array. '''
  
 
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| 00.57
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|Two dimensional array and
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|'''Two dimensional array''' and
  
 
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|00.59
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|Multi-dimensional array.  
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|'''Multi-dimensional array. '''
  
 
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|Let us see how to declare single dimensional array.
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|Let us see how to declare '''single dimensional array.'''
  
 
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|data-type name of the array and size
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|'''data-type name of the array and size'''
  
 
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|data-type, name of the array , size is equal to elements
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|'''data-type,( name of the array ), size is equal to elements'''
  
  
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|Please,note that our file name is array.c .
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|Please,note that our file name is '''array.c '''
  
  
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| This is our header file.
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| This is our '''header file.'''
  
  
 
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|02.20
 
|02.20
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|This is our main function.  
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|This is our '''main function'''.  
  
  
 
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| 02.22
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| Here, we have declared and initialized an array star with size 3.  
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| Here, we have declared and initialized an '''array star''' with size 3.  
  
 
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|Then we have declared an integer variable sum
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|Then we have declared an '''integer variable sum'''
  
 
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| Here we add the elements of the array and store the result in sum.  
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| Here we add the elements of the array and store the result in '''sum'''.  
  
 
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|This is our return statement.
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|This is our '''return statement.'''
  
 
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| 02.54
 
| 02.54
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|Now, click on Save.
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|Now, click on '''Save.'''
  
 
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|Please open the terminal window by pressing Ctrl, Alt and T keys simultaneously on your keyboard.
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|Please open the terminal window by pressing '''Ctrl, Alt and T ''' keys simultaneously on your keyboard.
  
 
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| 03.09
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|To compile type, gcc space array dot c space hypen o array and press Enter.
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|To compile type, '''gcc space array dot c space hypen o array''' and press '''Enter.'''
  
 
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| To execute type, dot slash array .Press Enter
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| To execute type, '''dot slash array '''.Press '''Enter'''
  
 
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|The sum is 15.
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|'''The sum is 15.'''
  
 
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|Click on Save. Let us see what happens
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|Click on '''Save'''. Let us see what happens
  
 
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|Now, click on Save
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|Now, click on '''Save'''
  
 
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|First press Shift , Ctrl and S keys  simultaneously on your keyboard
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|First press '''Shift , Ctrl and S''' keys  simultaneously on your keyboard
  
 
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| 04.38
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|Now save the file with the extension dot cpp and click on Save
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|Now save the file with the extension dot '''cpp''' and click on '''Save'''
  
 
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|Let us change the header file as iostream
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|Let us change the ''' header file''' as '''iostream'''
  
 
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|Now include the using statement
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|Now include the '''using''' statement
  
 
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|Now replace the printf statement with the cout statement.  
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|Now replace the '''printf''' statement with the '''cout''' statement.  
  
 
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|Now click on Save.  
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|Now click on '''Save.'''
  
 
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|To compile type, g++ space array dot cpp space hypen o space array1.
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|To compile type, '''g++ space array dot cpp space hypen o space array1.'''
  
 
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| 05.42
 
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|Here we have array1 because we dont want to overwrite the output parameter array for the file array dot c
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|Here we have array1 because we dont want to overwrite the output parameter '''array''' for the file '''array dot c'''
  
 
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| 05.51
 
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|Now press Enter.
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|Now press '''Enter.'''
  
 
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| 05.54
 
| 05.54
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|To execute type, dot slash array1 .Press Enter
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|To execute type,''' dot slash array1''' .Press '''Enter'''
  
 
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|The output is displayed as,  The sum is 15
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|The output is displayed as,  '''The sum is 15'''
  
 
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|example int star[3]={4, 5, 6}
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|example''' int star[3]={4, 5, 6}'''
  
 
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Revision as of 12:16, 26 March 2014

Time Narration


00.01 Welcome to the spoken-tutorial on Arrays in C and C++.
00.07 In this tutorial we will learn,
00.09 What is an array.
00.11 Declaration of an array.
00.13 Initialization of an array.
00.16 Few Examples on array
00.18 We will also see some common errors and their solutions.
00.22 To record this tutorial, I am using,
00.25 Ubuntu Operating System version 11.04
00.30 gcc and g++ Compiler version 4.6.1 .


00.36 Let us start with the introduction to Array.
00.39 Array is the collection of data or elements of same data-type.
00.44 Array index starts from 0.
00.48 The first element is stored at index 0.
00.52 There are three types of arrays:
00.55 Single dimensional array.
00.57 Two dimensional array and
00.59 Multi-dimensional array.
01.01 We will be discussing single dimensional array in this tutorial.
01.06 Let us see how to declare single dimensional array.
01.09 The Syntax for this is:
01.11 data-type name of the array and size
01.16 example, here we have declare an integer array star which contain 5 elements
01.24 The array index will start from star 0 to star 4
01.29 We saw the declaration of an array


01.32 Now, we will see the initialize of an array.
01.35 The Syntax for this is:
01.38 data-type,( name of the array ), size is equal to elements


01.44 example, here we have declared an integer array star with size 3. The elements of the array are 1,2 and 3
01.54 Here the index will start from star 0 to star 2
01.59 Now, lets us move to the examples
02.01 I have already typed the program on the editor.
02.04 So, let me open it.
02.06 Please,note that our file name is array.c


02.10 In this program, we will calculate the sum of the elements stored in an array.
02.16 Let me explain the code now
02.18 This is our header file.


02.20 This is our main function.


02.22 Here, we have declared and initialized an array star with size 3.
02.28 The elements of the array are 4, 5 and 6
02.33 Then we have declared an integer variable sum
02.36 Here we add the elements of the array and store the result in sum.
02.41 Note that 4 will be store at index 0, 5 will be store at index 1 and 6 will be store at index 2
02.50 Then we print the sum.
02.52 This is our return statement.
02.54 Now, click on Save.
02.57 Let us execute the program.
02.59 Please open the terminal window by pressing Ctrl, Alt and T keys simultaneously on your keyboard.
03.09 To compile type, gcc space array dot c space hypen o array and press Enter.
03.19 To execute type, dot slash array .Press Enter
03.24 Here the output is displayed as,
03.26 The sum is 15.
03.28 Now let us see some common errors which we can come accross.


03.32 Come back to our program.
03.34 Suppose here, at line number 4 we miss the curly brackets.
03.39 Click on Save. Let us see what happens
03.42 Come back to the terminal.
03.44 Let us compile as before.
03.47 We see an error
03.49 Invalid initializer and Expected identifier or bracket before numeric constant.
03.56 This is because arrays must be initialized within curly brackets.
04.01 Come back to our program. Let us fix the error.
04.04 Type the curly brackets here at line number 4.
04.09 Now, click on Save
04.12 Lets us execute. Come back to the terminal
04.15 Let us compile as before. Let us execute as before.


04.19 Yes,it is working


04.21 Now we will execute the same program in C++.
04.25 Come back to our program.
04.28 I will change a few things here.
04.30 First press Shift , Ctrl and S keys simultaneously on your keyboard
04.38 Now save the file with the extension dot cpp and click on Save
04.44 Let us change the header file as iostream
04.49 Now include the using statement
04.55 The declaration and initialization of an array is same in C++
05.01 Hence no need to change anything here
05.04 Now replace the printf statement with the cout statement.
05.09 Delete the format specifier and back slash n, now delete the comma and type two opening angle brackets
05.17 Delete the bracket here. Again type two opening angle brackets and within the double quotes type back slash n
05.26 Now click on Save.
05.29 Let us execute. Come back to a terminal.
05.32 To compile type, g++ space array dot cpp space hypen o space array1.
05.42 Here we have array1 because we dont want to overwrite the output parameter array for the file array dot c
05.51 Now press Enter.
05.54 To execute type, dot slash array1 .Press Enter
05.59 The output is displayed as, The sum is 15
06.02 We can see that it is similar to our C code
06.07 Now, we will see another common error.


06.10 Come back to our program
06.12 Suppose here, at line number 7
06.14 I will type star[1], star[2] and star[3];
06.23 Click on Save.
06.24 Let us execute. Come back to our terminal
06.28 Let me clear the prompt.
06.30 Let us compile as before.
06.33 Let us execute as before.
06.36 We get an unexpected output.


06.39 This is because array index starts from 0.
06.43 Come back to our program. We can see here the array index starts from one.
06.49 Hence it is giving an error. Let us fix the error.
06.54 Type 0 here 1 and 2. Click on Save
07.02 Let us execute. Come back to our terminal
07.05 Let us compile as before. Execute as before
07.09 Yes, it is working.
07.12 Now, we will go back to our slides
07.14 Le us summarize
07.16 In this tutorial we learned,


07.19 Arrays.
07.20 To declare Single Dimensional Arrays.
07.23 To initialize Single Dimensional Arrays.


07.26 example int star[3]={4, 5, 6}
07.31 To add the element of the array, example sum is equal to star 0 plus star 1 plus star 2
07.40 As an assignment,
07.41 Write a program to calculate the difference of the elements stored in an array.


07.47 Watch the video available at the link shown below
07.50 It summarizes the Spoken Tutorial project
07.53 If you do not have good bandwidth, you can download and watch it
07.57 The Spoken Tutorial Project Team
08.00 Conducts workshops using spoken tutorials
08.03 Gives certificates to those who pass an online test
08.06 For more details, please write to, contact@spoken-tutorial.org
08.13 Spoken Tutorial Project is a part of Talk to a Teacher project
08.17 It is supported by the National Mission on Education through ICT, MHRD, Government of India


08.25 More information on this Mission is available at the link shown below
08.30 This is Ashwini Patil from IIT Bombay signing off
08.33 Thank You for watching.

Contributors and Content Editors

Kavita salve, PoojaMoolya, Pratik kamble, Sandhya.np14

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