Difference between revisions of "C-and-C++/C3/Arrays/English-timed"
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PoojaMoolya (Talk | contribs) (Created page with '{| border = 1 |'''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 |Wha…') |
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Revision as of 17:34, 11 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. |
