Difference between revisions of "C-and-C++/C4/Working-With-Structures/English-timed"
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| − | |'''Ubuntu Operating System ''' version '''11. | + | |'''Ubuntu Operating System ''' version '''11.10''', |
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Revision as of 15:14, 16 July 2015
| Time | Narration |
| 00:01 | Welcome to the spoken-tutorial on Structures in C and C++. |
| 00:06 | In this tutorial we will learn, |
| 00:08 | * What is a Structure. |
| 00:10 | * Declaration of a structure. |
| 00:13 | We will do this through an example. |
| 00:15 | 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. |
| 00:28 | Let us start with an introduction to Structure . |
| 00:31 | When one or more variables are grouped under one name, it is known as structure. |
| 00:37 | Structure is used to group different data into one object. |
| 00:42 | It is called as compound data-type. |
| 00:45 | It is used to group related information together. |
| 00:49 | Now we will see the syntax to declare a structure. |
| 00:52 | Here, the keyword struct tells the compiler that a structure is declared. |
| 00:59 | strcut_name is the name of the structure. |
| 01:02 | eg. struct employee; |
| 01:04 | You can give any name. |
| 01:07 | Now we will see how to declare a structure variable. |
| 01:10 | The syntax for this is: |
| 01:13 | struct struct_name and struct_var; |
| 01:17 | struct_var is the variable of type struc_name. |
| 01:21 | example, struct employee addr; |
| 01:26 | addr is the variable of type employee. |
| 01:30 | Let us move on to our example. |
| 01:33 | I have already typed the program on the editor. So, let me open it. |
| 01:37 | Note that our file name is structure.c. |
| 01:41 | In this program we will calculate the total marks of three subjects using structure. |
| 01:48 | Let me explain the code now. |
| 01:51 | This is our header file. |
| 01:53 | Here we have declared a structure as student. |
| 01:57 | Then we have declared three integer variables as English, maths and science. |
| 02:03 | Variables defined under the structure are called as members of the structure. |
| 02:09 | This is our main() function. |
| 02:11 | Here we have declared an integer variable 'total'. |
| 02:16 | Now we have declared a structure variable stud, stud is the variable of type student, it is used to access and modify the structure members. |
| 02:28 | Here we have modified the members |
| 02:31 | by assigning them values as 75, 70 and 65. |
| 02:37 | Here we calculate the total of three subjects. |
| 02:41 | Then we print the result. |
| 02:44 | This is our return statement. |
| 02:46 | Now click on Save . |
| 02:48 | Let us execute the program. |
| 02:50 | Please open the terminal window by pressing |
| 02:54 | Ctrl, Alt and T keys simultaneously on your keyboard. |
| 02:59 | To compile, type gcc space structure.c space hyphen o space struct and press Enter. |
| 03:12 | To execute, type (dot slash)./struct. Press Enter. |
| 03:17 | The output is displayed as: |
| 03:20 | Total is 210 |
| 03:22 | Now we will execute the same program in C++ . |
| 03:26 | Come back to our program. |
| 03:28 | I will edit the same code. |
| 03:30 | First press Shift, Ctrl and S keys simultaneously on the keyboard. |
| 03:37 | Now save the file with an extension .cpp |
| 03:41 | and click on save. |
| 03:43 | Let's change the header file as iostream. |
| 03:47 | Now include the using statement |
| 03:53 | and click on save. |
| 03:56 | Structure declaration in C++ is same as in C. |
| 04:01 | So, no need to change anything here. |
| 04:05 | At the end we will replace the printf statement with the cout statement. |
| 04:12 | Delete the format specifier and (backslash n) \n. |
| 04:15 | Now delete the comma. |
| 04:17 | Type two opening angle brackets. |
| 04:20 | Here, delete the closing bracket |
| 04:22 | and type two opening angle brackets. |
| 04:25 | And within the double quotes, type \n (backslash n). |
| 04:29 | Now click on Save. |
| 04:31 | Let us execute the program. |
| 04:33 | Come back to our terminal. |
| 04:35 | To compile, type g++ space structure.cpp space hyphen o space struct1 . |
| 04:46 | Here we have struct1 because we don't want to overwrite the output parameters struct for the file structure.c . |
| 04:55 | Now press Enter. |
| 04:57 | To execute, type (dot slash) ./struct1. Press Enter. |
| 05:03 | The output is displayed as: |
| 05:05 | Total is 210 |
| 05:08 | You can see that the output is same as our C code. |
| 05:12 | Now let us go back to our slides. |
| 05:14 | We will summarize now. In this tutorial we learned, |
| 05:18 | * Structure |
| 05:19 | * Syntax of a structure |
| 05:20 | eg. struct struct_name; |
| 05:23 | * To access members of a structure. |
| 05:25 | Eg: stud.maths = 75; |
| 05:30 | * And to add the structure variables. |
| 05:33 | Eg: total = stud.eng + stud.maths + stud.science; |
| 05:40 | As an assignment, |
| 05:41 | write a program to display records of an employee. |
| 05:44 | Like name, address, designation, and salary. |
| 05:49 | Watch the video available at the link shown below. |
| 05:52 | It summarizes the Spoken Tutorial project. |
| 05:54 | If you do not have good bandwidth, you can download and watch it. |
| 05:59 | The Spoken Tutorial Project Team: |
| 06:01 | Conducts workshops using spoken tutorials. |
| 06:04 | Gives certificates to those who pass an online test. |
| 06:08 | For more details, please write to, contact@spoken-tutorial.org. |
| 06:15 | Spoken Tutorial Project is a part of Talk to a Teacher project. |
| 06:18 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
| 06:25 | More information on this mission is available at the link shown below. |
| 06:29 | This is Ashwini Patil from IIT Bombay, signing off. |
| 06:33 | Thank You for watching. |
Contributors and Content Editors
Kavita salve, Krupali, PoojaMoolya, Pratik kamble, Sandhya.np14, Sneha
