C-and-C++/C3/Working-With-2D-Arrays/English-timed
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Revision as of 15:56, 21 November 2013 by PoojaMoolya (Talk | contribs)
| Time | Narration
|
| 00.01 | Welcome to the spoken-tutorial on 2Dimensional Arrays in C and C++. |
| 00.08 | In this tutorial we will learn, |
| 00.10 | What is a 2Dimensional 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 | 2-D 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 declare 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 variable i and j. |
| 01.53 | Then we have declared num1 with 3 rows and 4 columns |
| 01.58 | And num2 again with 3rows and 4columns |
| 02.03 | num1 and num2 are 2 Dimensional array |
| 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 hypen array dot c space hyphen o space arr and press Enter. |
| 03.28 | To execute type, dot slash 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. |
| 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 slash t it 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 |
| 05.28 | Come back to a terminal |
| 05.31 | Let me clear the prompt |
| 05.33 | To comple type, g++ space 2D hypen 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 wil 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 turoial 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, |
| 06.55 | 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. |
