Difference between revisions of "Advanced-C++/C2/Exception-Handling/English-timed"
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− | | ''' | + | | '''Time''' |
| '''Narration''' | | '''Narration''' | ||
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| 00:01 | | 00:01 | ||
− | | Welcome to the spoken tutorial on Exception Handling in C++. | + | | Welcome to the '''spoken tutorial''' on '''Exception Handling''' in '''C++'''. |
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| 00:07 | | 00:07 | ||
− | | In this tutorial we will learn | + | | In this tutorial, we will learn |
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| 00:09 | | 00:09 | ||
− | |Exception Handling. | + | |'''Exception Handling.''' |
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| 00:14 | | 00:14 | ||
− | | To record this tutorial, I am using | + | | To record this tutorial, I am using: |
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| 00:16 | | 00:16 | ||
− | |'''Ubuntu OS '''version 11.10 | + | |'''Ubuntu OS '''version '''11.10''' |
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| 00:20 | | 00:20 | ||
− | |'''g++ compiler ''' | + | |'''g++ compiler '''version '''4.6.1''' |
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| 00:25 | | 00:25 | ||
− | | Let us start with an introduction to '''Exception''' | + | | Let us start with an introduction to '''Exception'''. |
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| 00:29 | | 00:29 | ||
− | |An exception is a problem that arises during the execution of a program | + | |An '''exception''' is a problem that arises during the execution of a program. |
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| 00:34 | | 00:34 | ||
− | |It is a run-time error that a program may detect | + | |It is a '''run-time error''' that a program may detect. |
|- | |- | ||
| 00:39 | | 00:39 | ||
− | | Let us move on to exception handling | + | | Let us move on to '''exception handling'''. |
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| 00:42 | | 00:42 | ||
− | |The response given to the problems | + | |The response given to the problems occurred during the execution of the program is known as '''exception handling.''' |
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| 00:50 | | 00:50 | ||
− | |Exception handling allows a program to continue execution. | + | |'''Exception handling''' allows a program to continue execution. |
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| 00:55 | | 00:55 | ||
− | |It helps | + | |It helps identifying the problem. |
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− | | 01:02 | + | |01:02 |
− | | | + | |Let us see the types of '''Exceptions'''- |
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| 01:05 | | 01:05 | ||
− | |'''Try''' | + | |'''Try''''''Catch''' and |
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− | + | ||
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| 01:07 | | 01:07 | ||
− | | | + | |'''Throw'''. |
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| 01:09 | | 01:09 | ||
− | |We place the error prone code inside a try block | + | |We place the '''error''' prone '''code''' inside a '''try block'''. |
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| 01:13 | | 01:13 | ||
− | |Then it is | + | |Then it is handled using '''throw.''' |
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| 01:16 | | 01:16 | ||
− | |After this the exception is caught | + | |After this, the '''exception''' is caught using the '''catch''' statement. |
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| 01:23 | | 01:23 | ||
− | | The syntax for try, catch and throw is: | + | | The '''syntax''' for '''try, catch''' and '''throw''' is: |
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| 01:27 | | 01:27 | ||
− | | | + | |'''throw:'''The '''try block''' and the '''catch block'''. |
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| 01:32 | | 01:32 | ||
− | |Here we pass argument | + | |Here, we pass '''argument'''. |
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| 01:35 | | 01:35 | ||
− | |The throw statement can be written inside the try block as well | + | |The '''throw''' statement can be written inside the '''try block''' as well. |
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| 01:40 | | 01:40 | ||
− | |We can have more than try, catch blocks. | + | |We can have more than one '''try, catch''' blocks. |
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| 01:44 | | 01:44 | ||
− | | Now let us see an example on exception handling. | + | | Now, let us see an example on '''exception handling.''' |
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| 01:48 | | 01:48 | ||
− | |I have the code, | + | |I have the code, I will open it. |
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| 01:51 | | 01:51 | ||
− | | Note that our | + | | Note that our file name is '''exception.cpp'''. |
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| 01:55 | | 01:55 | ||
− | |In this program we will solve the divide by zero error using exception handling. | + | |In this program, we will solve the 'divide by zero' '''error''' using '''exception handling.''' |
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| 02:02 | | 02:02 | ||
− | |Let us go through the code | + | |Let us go through the '''code'''. |
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| 02:11 | | 02:11 | ||
− | | Here we have function '''division''' with '''argument '''as''' int a''' and '''int b.''' | + | | Here we have function '''division()''' with '''argument '''as''' int a''' and '''int b.''' |
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| 02:22 | | 02:22 | ||
− | |If | + | |If '''True''', we '''throw''' an '''exception''' "Division by zero condition!". |
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| 02:27 | | 02:27 | ||
− | |The function returns division of''' a '''and''' b''' | + | |The function returns division of''' a '''and''' b'''. |
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| 02:32 | | 02:32 | ||
− | | This is our main function. | + | | This is our '''main()''' function. |
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| 02:34 | | 02:34 | ||
− | | In this we have declared integer variables as '''x,''' '''y '''and a double variable as ''' z.''' | + | | In this, we have declared '''integer variables''' as '''x,''' '''y '''and a '''double variable''' as ''' z.''' |
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| 02:42 | | 02:42 | ||
|Here we accept the value of''' x '''and''' y.''' | |Here we accept the value of''' x '''and''' y.''' | ||
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| 02:46 | | 02:46 | ||
− | | This is our '''try block''' | + | | This is our '''try block'''. |
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| 02:48 | | 02:48 | ||
− | |Here we have called the function''' division | + | |Here, we have called the function''' division()''' |
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| 02:51 | | 02:51 | ||
− | | | + | |and stored the result in '''z.''' |
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| 02:59 | | 02:59 | ||
− | |In this we pass an''' argument msg '''as a''' character constant.''' | + | |In this, we pass an''' argument 'msg' ''' as a''' character constant.''' |
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| 03:08 | | 03:08 | ||
− | | And this is our return statement. | + | | And this is our '''return''' statement. |
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| 03:11 | | 03:11 | ||
− | | | + | | Now, let us '''execute''' the program. |
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| 03:13 | | 03:13 | ||
− | | Open the terminal by pressing '''Ctrl, Alt and T '''keys simultaneously on your keyboard | + | | Open the '''terminal''' window by pressing '''Ctrl, Alt''' and '''T '''keys simultaneously on your keyboard. |
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| 03:21 | | 03:21 | ||
− | | To compile type | + | | To compile, type: |
− | + | '''g++ space exception dot cpp space hyphen o space ex'''. Press '''Enter'''. | |
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| 03:32 | | 03:32 | ||
− | |Type | + | |Type: '''dot slash ex''', press '''Enter'''. |
− | + | ||
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| 03:36 | | 03:36 | ||
− | |'''Enter the value of x and y | + | |'''Enter the value of x and y''' |
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| 03:38 | | 03:38 | ||
− | | | + | |I will give as 3 and 0. |
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| 03:42 | | 03:42 | ||
− | |The output is displayed as: '''Division by zero condition''' | + | |The '''output''' is displayed as: '''Division by zero condition!''' |
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| 03:46 | | 03:46 | ||
− | | | + | |Let us compile again. |
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| 03:48 | | 03:48 | ||
− | | | + | |Press the up-arrow key twice. |
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| 03:51 | | 03:51 | ||
− | |''' | + | |Press '''Enter'''.Again press the up-arrow key twice. |
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| 03:57 | | 03:57 | ||
− | | | + | |I will give as 8 and 2. |
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| 04:01 | | 04:01 | ||
− | | | + | |The output is 4. |
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| 04:04 | | 04:04 | ||
− | | This is how the try catch and throw block | + | | This is how the '''try, catch''' and '''throw block''' work. |
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| 04:11 | | 04:11 | ||
− | |Let us come back to our slides | + | |Let us come back to our '''slides'''. |
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| 04:14 | | 04:14 | ||
− | | Let us summarize | + | | Let us summarize. |
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| 04:16 | | 04:16 | ||
− | |In this tutorial, we have seen | + | |In this tutorial, we have seen- '''Exception Handling''', '''try''', '''catch''' and '''throw blocks'''. |
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| 04:23 | | 04:23 | ||
− | | As an assignment | + | | As an assignment- Display the age of employees. |
− | + | ||
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| 04:26 | | 04:26 | ||
− | |Throw an exception to check that the age is not less than 15. | + | |'''Throw''' an '''exception''' to check that the age is not less than 15. |
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| 04:31 | | 04:31 | ||
− | | Watch the video available at the link shown | + | | Watch the video available at the link shown below. |
|- | |- | ||
| 04:34 | | 04:34 | ||
− | |It summarizes the Spoken Tutorial project | + | |It summarizes the Spoken-Tutorial project. |
|- | |- | ||
| 04:38 | | 04:38 | ||
− | |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. |
|- | |- | ||
| 04:42 | | 04:42 | ||
− | | | + | |The Spoken Tutorial Project team: conducts workshops using spoken tutorials. |
|- | |- | ||
| 04:48 | | 04:48 | ||
− | |Gives certificates to those who pass an online test | + | |Gives certificates to those who pass an online test. |
|- | |- | ||
| 04:52 | | 04:52 | ||
− | |For more details, please write to | + | |For more details, please write to: contact@spoken-tutorial.org |
|- | |- | ||
| 04:59 | | 04:59 | ||
− | | Spoken Tutorial Project is a part of the Talk to a Teacher project | + | | Spoken Tutorial Project is a part of the "Talk to a Teacher" project. |
|- | |- | ||
| 05:04 | | 05:04 | ||
− | |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. |
|- | |- | ||
| 05:11 | | 05:11 | ||
− | |More information on this | + | |More information on this mission is available at the link shown below: http://spoken-tutorial.org/NMEICT-Intro |
|- | |- | ||
| 05:16 | | 05:16 | ||
− | | | + | |This is Ashwini Patil from IIT Bombay, signing off.Thank You for joining. |
− | + | ||
− | Thank You for joining. | + | |
|} | |} |
Latest revision as of 15:10, 23 March 2017
Time | Narration |
00:01 | Welcome to the spoken tutorial on Exception Handling in C++. |
00:07 | In this tutorial, we will learn |
00:09 | Exception Handling. |
00:11 | We will do this with the help of an example. |
00:14 | To record this tutorial, I am using: |
00:16 | Ubuntu OS version 11.10 |
00:20 | g++ compiler version 4.6.1 |
00:25 | Let us start with an introduction to Exception. |
00:29 | An exception is a problem that arises during the execution of a program. |
00:34 | It is a run-time error that a program may detect. |
00:39 | Let us move on to exception handling. |
00:42 | The response given to the problems occurred during the execution of the program is known as exception handling. |
00:50 | Exception handling allows a program to continue execution. |
00:55 | It helps identifying the problem. |
00:57 | And terminates the program in a controlled manner. |
01:02 | Let us see the types of Exceptions- |
01:05 | 'Try'Catch and |
01:07 | Throw. |
01:09 | We place the error prone code inside a try block. |
01:13 | Then it is handled using throw. |
01:16 | After this, the exception is caught using the catch statement. |
01:21 | And then it is processed. |
01:23 | The syntax for try, catch and throw is: |
01:27 | throw:The try block and the catch block. |
01:32 | Here, we pass argument. |
01:35 | The throw statement can be written inside the try block as well. |
01:40 | We can have more than one try, catch blocks. |
01:44 | Now, let us see an example on exception handling. |
01:48 | I have the code, I will open it. |
01:51 | Note that our file name is exception.cpp. |
01:55 | In this program, we will solve the 'divide by zero' error using exception handling. |
02:02 | Let us go through the code. |
02:04 | This is our header file as iostream. |
02:07 | Here we are using the std namespace. |
02:11 | Here we have function division() with argument as int a and int b. |
02:18 | Then we check whether b ==0. |
02:22 | If True, we throw an exception "Division by zero condition!". |
02:27 | The function returns division of a and b. |
02:32 | This is our main() function. |
02:34 | In this, we have declared integer variables as x, y and a double variable as z. |
02:42 | Here we accept the value of x and y. |
02:46 | This is our try block. |
02:48 | Here, we have called the function division() |
02:51 | and stored the result in z. |
02:54 | Then we print the value of z. |
02:57 | This is our catch block. |
02:59 | In this, we pass an argument 'msg' as a character constant. |
03:06 | Then we print the msg. |
03:08 | And this is our return statement. |
03:11 | Now, let us execute the program. |
03:13 | Open the terminal window by pressing Ctrl, Alt and T keys simultaneously on your keyboard. |
03:21 | To compile, type:
g++ space exception dot cpp space hyphen o space ex. Press Enter. |
03:32 | Type: dot slash ex, press Enter. |
03:36 | Enter the value of x and y |
03:38 | I will give as 3 and 0. |
03:42 | The output is displayed as: Division by zero condition! |
03:46 | Let us compile again. |
03:48 | Press the up-arrow key twice. |
03:51 | Press Enter.Again press the up-arrow key twice. |
03:55 | Enter value of x and y |
03:57 | I will give as 8 and 2. |
04:01 | The output is 4. |
04:04 | This is how the try, catch and throw block work. |
04:08 | This brings us to the end of this tutorial. |
04:11 | Let us come back to our slides. |
04:14 | Let us summarize. |
04:16 | In this tutorial, we have seen- Exception Handling, try, catch and throw blocks. |
04:23 | As an assignment- Display the age of employees. |
04:26 | Throw an exception to check that the age is not less than 15. |
04:31 | Watch the video available at the link shown below. |
04:34 | It summarizes the Spoken-Tutorial project. |
04:38 | If you do not have good bandwidth, you can download and watch it. |
04:42 | The Spoken Tutorial Project team: conducts workshops using spoken tutorials. |
04:48 | Gives certificates to those who pass an online test. |
04:52 | For more details, please write to: contact@spoken-tutorial.org |
04:59 | Spoken Tutorial Project is a part of the "Talk to a Teacher" project. |
05:04 | It is supported by the National Mission on Education through ICT, MHRD, Government of India. |
05:11 | More information on this mission is available at the link shown below: http://spoken-tutorial.org/NMEICT-Intro |
05:16 | This is Ashwini Patil from IIT Bombay, signing off.Thank You for joining. |