Difference between revisions of "C-and-C++/C3/Working-With-2D-Arrays/English-timed"
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{| border = 1 | {| border = 1 | ||
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|'''Time''' | |'''Time''' | ||
− | |||
|'''Narration''' | |'''Narration''' | ||
− | |||
|- | |- | ||
− | | 00 | + | | 00:01 |
− | |Welcome to the spoken-tutorial on | + | |Welcome to the spoken-tutorial on '''2 Dimensional Arrays''' in '''C''' and '''C++.''' |
|- | |- | ||
− | | 00 | + | | 00:08 |
− | |In this tutorial we will learn | + | |In this tutorial, we will learn- |
|- | |- | ||
− | | 00 | + | | 00:10 |
− | | | + | |what is a '''2 Dimensional array.''' |
|- | |- | ||
− | | 00 | + | | 00:13 |
|We will do this through an example. | |We will do this through an example. | ||
|- | |- | ||
− | | 00 | + | | 00:16 |
|To record this tutorial, I am using | |To record this tutorial, I am using | ||
|- | |- | ||
− | | 00 | + | | 00:18 |
− | | Ubuntu Operating System version 11.10, | + | | '''Ubuntu Operating System''' version 11.10, |
|- | |- | ||
− | | 00 | + | | 00:22 |
− | |gcc and g++ Compiler version 4.6.1 on Ubuntu | + | |'''gcc''' and '''g++ Compiler''' version 4.6.1 on Ubuntu. |
|- | |- | ||
− | | 00 | + | | 00:29 |
− | | Let us start with the introduction to 2 dimensional Array | + | | Let us start with the introduction to '''2 dimensional Array'''. |
|- | |- | ||
− | | 00 | + | | 00:33 |
− | | | + | |'''2D arrays''' are stored in a row column matrix. |
|- | |- | ||
− | |00 | + | |00:38 |
| The left index indicates the row. | | The left index indicates the row. | ||
− | |||
|- | |- | ||
− | |00 | + | |00:41 |
|The right index indicates the column. | |The right index indicates the column. | ||
|- | |- | ||
− | |00 | + | |00:44 |
− | |Starting index of a matrix or array in C and C++ is always 0 | + | |Starting index of a matrix or array in C and C++ is always 0. |
|- | |- | ||
− | |00 | + | |00:52 |
− | |Here we see a 2 Dimensional array in a row column matrix | + | |Here, we see a 2 Dimensional array in a row column matrix. |
|- | |- | ||
− | | 00 | + | | 00:58 |
− | |Starting index is 0 | + | |Starting index is 0. |
|- | |- | ||
− | |01 | + | |01:01 |
− | |Now, let us see how to declare 2 dimensional array | + | |Now, let us see how to declare '''2 dimensional array'''. |
|- | |- | ||
− | | 01 | + | | 01:04 |
|The Syntax for this is: | |The Syntax for this is: | ||
|- | |- | ||
− | | 01 | + | | 01:07 |
− | |data-type ,array name, row and column. | + | |'''data-type ,array name, row and column.''' |
|- | |- | ||
− | |01 | + | |01:13 |
− | |example, here we have | + | |example, here we have declared a 2 dimensional array '''num''' with 2 rows and 3 columns. |
|- | |- | ||
− | | 01 | + | | 01:21 |
|Now let us see an example. | |Now let us see an example. | ||
|- | |- | ||
− | | 01 | + | | 01:23 |
|I have already typed the program, let me open it. | |I have already typed the program, let me open it. | ||
|- | |- | ||
− | |01 | + | |01:28 |
− | |Note that our file name is 2d hyphen array dot c | + | |Note that our file name is '''2d hyphen array dot c'''. |
|- | |- | ||
− | |01 | + | |01:33 |
− | |In this program we will calculate the sum of the elements of the 2 | + | |In this program, we will calculate the sum of the elements of the 2 dimensional array. |
|- | |- | ||
− | |01 | + | |01:41 |
|Let me explain the code now. | |Let me explain the code now. | ||
|- | |- | ||
− | |01 | + | |01:44 |
− | |This is our header file. | + | |This is our '''header file.''' |
|- | |- | ||
− | |01 | + | |01:46 |
− | |This is our main function. | + | |This is our '''main()''' function. |
|- | |- | ||
− | |01 | + | |01:49 |
− | |Here | + | |Here we have declared variables i and j. |
|- | |- | ||
− | | 01 | + | | 01:53 |
− | |Then we have declared num1 with 3 rows and 4 columns | + | |Then we have declared num1 with 3 rows and 4 columns. |
|- | |- | ||
− | | 01 | + | | 01:58 |
− | |And num2 again with | + | |And num2, again with 3 rows and 4 columns. |
|- | |- | ||
− | | 02 | + | | 02:03 |
− | |num1 and num2 are 2 | + | |num1 and num2 are 2 dimensional arrays. |
|- | |- | ||
− | | 02 | + | | 02:07 |
− | |Here we take elements of the matrix num1 as input from the user. | + | |Here, we take elements of the matrix '''num1''' as input from the user. |
|- | |- | ||
− | |02 | + | |02:13 |
|The elements are stored row-wise. | |The elements are stored row-wise. | ||
|- | |- | ||
− | |02 | + | |02:16 |
|We have considered i for rows and j for columns. | |We have considered i for rows and j for columns. | ||
|- | |- | ||
− | |02 | + | |02:22 |
− | |This for loop will check the condition that i runs from 0 to 2. | + | |This '''for''' loop will check the condition that i runs from 0 to 2. |
|- | |- | ||
− | | 02 | + | | 02:28 |
− | |This for loop will check the condition that j runs from 0 to 3. | + | |This '''for''' loop will check the condition that j runs from 0 to 3. |
|- | |- | ||
− | | 02 | + | | 02:33 |
− | | Similarly, | + | | Similarly, here we take elements of the matrix '''num2''' as input from the user. |
|- | |- | ||
− | | 02 | + | | 02:40 |
− | | Here we display the matrix num1 | + | | Here we display the matrix num1. |
|- | |- | ||
− | | 02 | + | | 02:43 |
| Here percent 3d is used to align the matrix on the terminal. | | Here percent 3d is used to align the matrix on the terminal. | ||
|- | |- | ||
− | | 02 | + | | 02:49 |
− | | Now,here we display the matrix num2 | + | | Now, here we display the matrix num2. |
|- | |- | ||
− | |02 | + | |02:52 |
|Then we add the num1 matrix and the num2 matrix and display the result. | |Then we add the num1 matrix and the num2 matrix and display the result. | ||
|- | |- | ||
− | | 02 | + | | 02:59 |
− | | This is our return statement. | + | | This is our '''return''' statement. |
|- | |- | ||
− | | 03 | + | | 03:01 |
|Now, click on Save. | |Now, click on Save. | ||
|- | |- | ||
− | | 03 | + | | 03:05 |
| Let us execute the program. | | Let us execute the program. | ||
|- | |- | ||
− | | 03 | + | | 03:07 |
− | |Please open the terminal window by pressing Ctrl, Alt and T keys simultaneously on your keyboard. | + | |Please open the terminal window by pressing '''Ctrl, Alt''' and '''T''' keys simultaneously on your keyboard. |
|- | |- | ||
− | | 03 | + | | 03:15 |
− | | To compile | + | | To compile, type '''gcc''' space '''2d''' hyphen '''array''' dot '''c''' space '''hyphen o''' space''' arr''' and press '''Enter.''' |
|- | |- | ||
− | | 03 | + | | 03:28 |
− | |To execute | + | |To execute, type '''dot slash arr''' (./arr), now press '''Enter '''. |
|- | |- | ||
− | | 03 | + | | 03:34 |
− | |Here we see Enter the elements of 3 into 4 array num1 | + | |Here we see '''Enter the elements of 3 into 4 array num1'''. |
|- | |- | ||
− | | 03 | + | | 03:39 |
| I will enter the values now. | | I will enter the values now. | ||
|- | |- | ||
− | | 03 | + | | 03:52 |
− | | Now we can see | + | | Now we can see '''Enter the elements of 3 into 4 array num2'''. |
− | + | ||
|- | |- | ||
− | | 03 | + | | 03:57 |
− | |I will enter the values | + | |I will enter the values. |
|- | |- | ||
− | | 04 | + | | 04:10 |
| The output is displayed. | | The output is displayed. | ||
− | |||
|- | |- | ||
− | | 04 | + | | 04:13 |
− | |Here we can see the num1 matrix | + | |Here we can see the num1 matrix. |
|- | |- | ||
− | | 04 | + | | 04:16 |
− | |Here we can see the num2 matrix | + | |Here we can see the num2 matrix. |
|- | |- | ||
− | | 04 | + | | 04:20 |
− | |And this is the sum of num1 and num2 | + | |And this is the sum of num1 and num2. |
|- | |- | ||
− | | 04 | + | | 04:24 |
− | |Now we will see how to execute the same program in C++ | + | |Now we will see how to execute the same program in C++. |
|- | |- | ||
− | | 04 | + | | 04:29 |
− | |I have already made the program.I will open it and explain. | + | |I have already made the program. I will open it and explain. |
|- | |- | ||
− | | 04 | + | | 04:34 |
− | |This is the program for 2 Dimensional arrays in C++ | + | |This is the program for '''2 Dimensional arrays''' in C++. |
|- | |- | ||
− | | 04 | + | | 04:38 |
− | | Note that our file name is | + | | Note that our file name is''' 2d hyphen array dot cpp'''. |
|- | |- | ||
− | | 04 | + | | 04:43 |
− | |The extension is dot cpp. | + | |The extension is '''dot cpp''' (.cpp). |
|- | |- | ||
− | | 04 | + | | 04:47 |
− | |Let me explain the code now | + | |Let me explain the code now. |
|- | |- | ||
− | | 04 | + | | 04:50 |
− | |This is our header file as iostream | + | |This is our header file as '''iostream'''. |
|- | |- | ||
− | | 04 | + | | 04:53 |
− | |This is our using statement. | + | |This is our '''using''' statement. |
|- | |- | ||
− | | 04 | + | | 04:56 |
− | |This is our main function | + | |This is our '''main()''' function. |
− | + | ||
|- | |- | ||
− | | 04 | + | | 04:58 |
− | |Here we have cout function as we use cout to print the output in C++. | + | |Here we have '''cout''' function as we use '''cout''' to print the output in C++. |
|- | |- | ||
− | | 05 | + | | 05:06 |
− | |Then we have cin function. We use cin to read a line in C++ | + | |Then we have '''cin''' function. We use '''cin''' to read a line in C++. |
|- | |- | ||
− | | 05 | + | | 05:13 |
− | |Here,we use | + | |Here, we use '''/ t ''' bit mean horizontal tab that is equivalent to 4 spaces. |
|- | |- | ||
− | | 05 | + | | 05:21 |
|Rest of the code is similar to our C code. | |Rest of the code is similar to our C code. | ||
|- | |- | ||
− | | 05 | + | | 05:25 |
− | |Now click on Save | + | |Now click on Save. |
|- | |- | ||
− | | 05 | + | | 05:27 |
− | |Let us execute | + | |Let us execute. Come back to a terminal. |
|- | |- | ||
− | | 05 | + | | 05:31 |
− | | | + | |Let me clear the prompt. |
|- | |- | ||
− | | 05 | + | | 05:33 |
− | | | + | |To compile, type '''g++ space 2d hyphen array dot cpp hyphen o space arr1''' and press ''' Enter.''' |
|- | |- | ||
− | | 05 | + | | 05:47 |
− | |To | + | |To execute, type '''dot slash arr1''', now press Enter. |
|- | |- | ||
− | | 05 | + | | 05:52 |
− | | | + | |Here we see '''Enter the elements of 3 into 4 array num1.''' |
|- | |- | ||
− | | 05 | + | | 05:57 |
− | | | + | |I will enter the values. |
|- | |- | ||
− | | | + | | 06:07 |
− | | | + | |Now, we see '''Enter the elements of 3 into 4 array num2.''' |
|- | |- | ||
− | | 06 | + | | 06:13 |
− | | | + | |I will give the values as: |
− | + | ||
|- | |- | ||
− | | 06 | + | | 06:24 |
− | | | + | |The output is displayed. |
|- | |- | ||
− | | 06 | + | | 06:26 |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
|We can see the num1 matrix, the num2 matrix. | |We can see the num1 matrix, the num2 matrix. | ||
|- | |- | ||
− | | 06 | + | | 06:31 |
|And this is the sum of num1 and num2. | |And this is the sum of num1 and num2. | ||
|- | |- | ||
− | | 06 | + | | 06:36 |
− | |This brings us to the end of this tutorial | + | |This brings us to the end of this tutorial. |
|- | |- | ||
− | | 06 | + | | 06:39 |
− | |Come back to our slide. Let us Summarize | + | |Come back to our slide. Let us Summarize. |
|- | |- | ||
− | | 06 | + | | 06:43 |
− | |In this | + | |In this tutorial we learnt: |
|- | |- | ||
− | | 06 | + | | 06:45 |
|To add elements in a 2D array. | |To add elements in a 2D array. | ||
|- | |- | ||
− | | 06 | + | | 06:48 |
|To print 2D array. | |To print 2D array. | ||
|- | |- | ||
− | | 06 | + | | 06:50 |
− | |And | + | |And to calculate the sum of 2Dimensional array. |
− | + | ||
− | + | ||
− | + | ||
− | + | ||
|- | |- | ||
− | | 06 | + | | 06:54 |
− | | Write the program that takes two 2Dimensional arrays as input from the user. | + | |As an assignment: Write the program that takes two 2Dimensional arrays as input from the user. |
|- | |- | ||
− | | 07 | + | | 07:01 |
|Subtract them and find the result. | |Subtract them and find the result. | ||
|- | |- | ||
− | | 07 | + | | 07:05 |
− | |Watch the video available at the link shown below | + | |Watch the video available at the link shown below: |
|- | |- | ||
− | | 07 | + | | 07:08 |
− | |It summarizes the Spoken Tutorial project | + | |It summarizes the Spoken Tutorial project. |
|- | |- | ||
− | | 07 | + | | 07:11 |
− | |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. |
|- | |- | ||
− | | 07 | + | | 07:15 |
− | |The Spoken Tutorial Project Team | + | |The Spoken Tutorial Project Team: |
|- | |- | ||
− | | 07 | + | | 07:17 |
− | |Conducts workshops using spoken tutorials | + | |Conducts workshops using spoken tutorials. |
|- | |- | ||
− | | 07 | + | | 07:21 |
− | |Gives certificates to those who pass an online test | + | |Gives certificates to those who pass an online test. |
|- | |- | ||
− | | 07 | + | | 07:25 |
− | |For more details, please write to, contact@spoken-tutorial.org | + | |For more details, please write to, contact@spoken-tutorial.org. |
|- | |- | ||
− | |07 | + | |07:32 |
− | |Spoken Tutorial Project is a part of Talk to a Teacher project | + | |Spoken Tutorial Project is a part of Talk to a Teacher project. |
|- | |- | ||
− | | 07 | + | | 07:36 |
− | |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 | + | | 07:43 |
− | |More information on this | + | |More information on this mission is available at the link shown below. |
|- | |- | ||
− | | 07 | + | | 07:48 |
− | |The script is contributed by Ritwik Joshi. This is Ashwini Patil | + | |The script is contributed by Ritwik Joshi. This is Ashwini Patil from IIT Bombay. |
|- | |- | ||
− | | 07 | + | | 07:54 |
|Thank you for watching. | |Thank you for watching. |
Latest revision as of 14:29, 24 March 2017
Time | Narration |
00:01 | Welcome to the spoken-tutorial on 2 Dimensional Arrays in C and C++. |
00:08 | In this tutorial, we will learn- |
00:10 | what is a 2 Dimensional array. |
00:13 | We will do this through an example. |
00:16 | To record this tutorial, I am using |
00:18 | Ubuntu Operating System version 11.10, |
00:22 | gcc and g++ Compiler version 4.6.1 on Ubuntu. |
00:29 | Let us start with the introduction to 2 dimensional Array. |
00:33 | 2D arrays are stored in a row column matrix. |
00:38 | The left index indicates the row. |
00:41 | The right index indicates the column. |
00:44 | Starting index of a matrix or array in C and C++ is always 0. |
00:52 | Here, we see a 2 Dimensional array in a row column matrix. |
00:58 | Starting index is 0. |
01:01 | Now, let us see how to declare 2 dimensional array. |
01:04 | The Syntax for this is: |
01:07 | data-type ,array name, row and column. |
01:13 | example, here we have declared a 2 dimensional array num with 2 rows and 3 columns. |
01:21 | Now let us see an example. |
01:23 | I have already typed the program, let me open it. |
01:28 | Note that our file name is 2d hyphen array dot c. |
01:33 | In this program, we will calculate the sum of the elements of the 2 dimensional array. |
01:41 | Let me explain the code now. |
01:44 | This is our header file. |
01:46 | This is our main() function. |
01:49 | Here we have declared variables i and j. |
01:53 | Then we have declared num1 with 3 rows and 4 columns. |
01:58 | And num2, again with 3 rows and 4 columns. |
02:03 | num1 and num2 are 2 dimensional arrays. |
02:07 | Here, we take elements of the matrix num1 as input from the user. |
02:13 | The elements are stored row-wise. |
02:16 | We have considered i for rows and j for columns. |
02:22 | This for loop will check the condition that i runs from 0 to 2. |
02:28 | This for loop will check the condition that j runs from 0 to 3. |
02:33 | Similarly, here we take elements of the matrix num2 as input from the user. |
02:40 | Here we display the matrix num1. |
02:43 | Here percent 3d is used to align the matrix on the terminal. |
02:49 | Now, here we display the matrix num2. |
02:52 | Then we add the num1 matrix and the num2 matrix and display the result. |
02:59 | This is our return statement. |
03:01 | Now, click on Save. |
03:05 | Let us execute the program. |
03:07 | Please open the terminal window by pressing Ctrl, Alt and T keys simultaneously on your keyboard. |
03:15 | To compile, type gcc space 2d hyphen array dot c space hyphen o space arr and press Enter. |
03:28 | To execute, type dot slash arr (./arr), now press Enter . |
03:34 | Here we see Enter the elements of 3 into 4 array num1. |
03:39 | I will enter the values now. |
03:52 | Now we can see Enter the elements of 3 into 4 array num2. |
03:57 | I will enter the values. |
04:10 | The output is displayed. |
04:13 | Here we can see the num1 matrix. |
04:16 | Here we can see the num2 matrix. |
04:20 | And this is the sum of num1 and num2. |
04:24 | Now we will see how to execute the same program in C++. |
04:29 | I have already made the program. I will open it and explain. |
04:34 | This is the program for 2 Dimensional arrays in C++. |
04:38 | Note that our file name is 2d hyphen array dot cpp. |
04:43 | The extension is dot cpp (.cpp). |
04:47 | Let me explain the code now. |
04:50 | This is our header file as iostream. |
04:53 | This is our using statement. |
04:56 | This is our main() function. |
04:58 | Here we have cout function as we use cout to print the output in C++. |
05:06 | Then we have cin function. We use cin to read a line in C++. |
05:13 | Here, we use / t bit mean horizontal tab that is equivalent to 4 spaces. |
05:21 | Rest of the code is similar to our C code. |
05:25 | Now click on Save. |
05:27 | Let us execute. Come back to a terminal. |
05:31 | Let me clear the prompt. |
05:33 | To compile, type g++ space 2d hyphen array dot cpp hyphen o space arr1 and press Enter. |
05:47 | To execute, type dot slash arr1, now press Enter. |
05:52 | Here we see Enter the elements of 3 into 4 array num1. |
05:57 | I will enter the values. |
06:07 | Now, we see Enter the elements of 3 into 4 array num2. |
06:13 | I will give the values as: |
06:24 | The output is displayed. |
06:26 | We can see the num1 matrix, the num2 matrix. |
06:31 | And this is the sum of num1 and num2. |
06:36 | This brings us to the end of this tutorial. |
06:39 | Come back to our slide. Let us Summarize. |
06:43 | In this tutorial we learnt: |
06:45 | To add elements in a 2D array. |
06:48 | To print 2D array. |
06:50 | And to calculate the sum of 2Dimensional array. |
06:54 | As an assignment: Write the program that takes two 2Dimensional arrays as input from the user. |
07:01 | Subtract them and find the result. |
07:05 | Watch the video available at the link shown below: |
07:08 | It summarizes the Spoken Tutorial project. |
07:11 | If you do not have good bandwidth, you can download and watch it. |
07:15 | The Spoken Tutorial Project Team: |
07:17 | Conducts workshops using spoken tutorials. |
07:21 | Gives certificates to those who pass an online test. |
07:25 | For more details, please write to, contact@spoken-tutorial.org. |
07:32 | Spoken Tutorial Project is a part of Talk to a Teacher project. |
07:36 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
07:43 | More information on this mission is available at the link shown below. |
07:48 | The script is contributed by Ritwik Joshi. This is Ashwini Patil from IIT Bombay. |
07:54 | Thank you for watching. |