Difference between revisions of "C-and-C++/C2/Arithmetic-Operators/English-timed"

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| Welcome to the spoken tutorial on '''Arithmetic Operators in C ''''''C++'''.
 
| Welcome to the spoken tutorial on '''Arithmetic Operators in C ''''''C++'''.
  
 
|-
 
|-
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| 00.08
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| 00.07
 
| In this tutorial, we will learn about  
 
| In this tutorial, we will learn about  
  
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|Arithmetic operators like
 
|Arithmetic operators like
  
−
+ Addition: eg. a+b.
 
  
−
- Subtraction: eg. a-b.
 
  
−
/ Division: eg. a/b.
 
  
−
*  Multiplication: eg. a*b.
 
  
−
% Modulus: eg. a%b.
+
|-
 +
| 00.11
 +
|+ Addition: eg. a+b.
 +
 
 +
|-
 +
| 00.14
 +
|- Subtraction: eg. a-b.
 +
 
 +
|-
 +
| 00.18
 +
|/ Division: eg. a/b.
 +
 
 +
|-
 +
| 00.20
 +
| *  Multiplication: eg. a*b.
 +
 
 +
|-
 +
| 00.24
 +
| % Modulus: eg. a%b.
  
 
|-
 
|-
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|  00.28
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|  00.27
 
| To record this tutorial, I am using:'''Ubuntu 11.10''' as the operating system   
 
| To record this tutorial, I am using:'''Ubuntu 11.10''' as the operating system   
  
 
|-
 
|-
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| 00.33
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| 00.32
 
|'''gcc''' and '''g++ Compiler version 4.6.1 in Ubuntu'''.
 
|'''gcc''' and '''g++ Compiler version 4.6.1 in Ubuntu'''.
  
 
|-
 
|-
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|00.39
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|00.38
 
| I will now demonstrate the use of these arithmetic operations with the help of a '''C''' program.
 
| I will now demonstrate the use of these arithmetic operations with the help of a '''C''' program.
  
 
|-
 
|-
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|  00.45
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|  00.44
 
|  I have already written the program.
 
|  I have already written the program.
  
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|-
 
|-
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|  00.50
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|  00.49
 
|  Here is the C program for arithmetic operators.
 
|  Here is the C program for arithmetic operators.
  
 
|-
 
|-
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| 00.57
+
| 00.56
 
| the first two statements the variables are declared and defined.
 
| the first two statements the variables are declared and defined.
  
 
|-
 
|-
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| 01.03
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| 01.02
 
|In the next two statements,
 
|In the next two statements,
  
 
|-
 
|-
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| 01.05
+
| 01.04
 
|'''a''' is assigned the value of 5.
 
|'''a''' is assigned the value of 5.
  
 
|-
 
|-
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| 01.07
+
| 01.06
 
|'''b''' is assigned the value of 2.
 
|'''b''' is assigned the value of 2.
  
 
|-
 
|-
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|  01.11
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|  01.10
 
|  Now let's see how the addition operator works.
 
|  Now let's see how the addition operator works.
  
 
|-
 
|-
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| 01.15
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| 01.14
 
|'''c''' holds the sum of '''a''' and '''b'''.
 
|'''c''' holds the sum of '''a''' and '''b'''.
  
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|-
 
|-
−
| 01.29
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| 01.28
−
|Here %.2f provides the precision of two digits after the decimal point.
+
|Here % dot 2f provides the precision of two digits after the decimal point.
  
 
|-
 
|-
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|-
 
|-
−
| 01.49
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| 01.48
 
|Let's see how these two operators work.
 
|Let's see how these two operators work.
  
 
|-
 
|-
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|  01.53
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|  01.52
 
|  We will comment out the following lines
 
|  We will comment out the following lines
  
 
|-
 
|-
−
| 01.56
+
| 01.55
−
|Type  '''/*''' '' */ ''
+
|Type  '''/*'''
 +
 
 +
|-
 +
| 02.01
 +
| '' */ ''
  
 
|-
 
|-
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|-
 
|-
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| 02.08
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| 02.07
 
|Save the file with extension '''.c'''
 
|Save the file with extension '''.c'''
  
 
|-
 
|-
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| 02.11
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| 02.10
−
|I have saved the file as''' arithmetic.c'''
+
|I have saved my file as''' arithmetic.c'''
  
 
|-
 
|-
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|-
 
|-
−
| 02.23
+
| 02.22
 
| To compile the code, type the following on the terminal.
 
| To compile the code, type the following on the terminal.
  
 
|-
 
|-
 
| 02.27
 
| 02.27
−
|'''gcc arithmetic.c -o arith'''
+
|'''gcc space arithmetic dot c space minus o space arith'''
  
 
|-
 
|-
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|-
 
|-
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| 02.41
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| 02.40
 
|To execute the code, type '''./arith'''
 
|To execute the code, type '''./arith'''
  
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|-
 
|-
−
|  03.05
+
|  03.03
 
|  Now you should try the subtraction operator on your own  
 
|  Now you should try the subtraction operator on your own  
  
 
|-
 
|-
−
| 03.09
+
| 03.08
 
|Try replacing the addition operator with subtraction operator.  
 
|Try replacing the addition operator with subtraction operator.  
  
 
|-
 
|-
−
| 03.14
+
| 03.13
 
|You should get the result as 3.
 
|You should get the result as 3.
  
 
|-
 
|-
−
|  03.19
+
|  03.18
 
|  Coming back to the program and the last set of statements.
 
|  Coming back to the program and the last set of statements.
  
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|-
 
|-
 
| 03.26
 
| 03.26
−
|Remove the multi line comments from here and here.
+
|Remove the multi line comments here and here.
  
 
|-
 
|-
−
|  03.35
+
|  03.34
 
|  In these statements, '''c''' holds the value of integer division of '''a''' by '''b'''.
 
|  In these statements, '''c''' holds the value of integer division of '''a''' by '''b'''.
  
 
|-
 
|-
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| 03.41
+
| 03.40
 
|Please note that in integer division the fractional part is truncated.
 
|Please note that in integer division the fractional part is truncated.
  
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|-
 
|-
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|  03.58
+
|  03.57
 
|  In this statement we are performing real division.
 
|  In this statement we are performing real division.
  
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| We have type-cast variable a.
 
| We have type-cast variable a.
 
|-
 
|-
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| 04.14
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| 04.13
−
|Now a will behave as a float varible for a single operation.
+
|Now a will behave as a float variable for a single operation.
  
  
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|-
 
|-
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|04.31
+
|04.30
 
| Type '''return 0''' and close the ending curly bracket.
 
| Type '''return 0''' and close the ending curly bracket.
  
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|-
 
|-
 
| 04.45
 
| 04.45
−
| | To compile, type'''gcc arithmetic.c -o arith'''. Press Enter
+
| | To compile, type'''gcc space arithmetic dot c minus o space arith'''. Press Enter
  
 
|-
 
|-
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|We have the previous outputs of addition and multiplication operators.
 
|We have the previous outputs of addition and multiplication operators.
 
|-
 
|-
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|  05.17
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|  05.16
 
|we have the integer Division of 5 by 2 is 2.  
 
|we have the integer Division of 5 by 2 is 2.  
  
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|-
 
|-
 
|05.22
 
|05.22
−
|We can see  that  in integer division fractional part is truncated.
+
|We can see  that  in integer division the fractional part is truncated.
  
  
 
|-
 
|-
 
| 05.29
 
| 05.29
−
|then we have  the real division of 5 by 2 is 2.50.
+
|then we have  the real division of 5 by 2 is 2.5.
  
 
|-
 
|-
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|-
 
|-
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| 05.38
+
| 05.37
 
|We  used type-casting to obtain these result.
 
|We  used type-casting to obtain these result.
  
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|-
 
|-
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| 05.55
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| 05.54
 
|  Let's find out.
 
|  Let's find out.
  
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|-
 
|-
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| 06.01
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| 06.00
 
|  Here is a C++  code.
 
|  Here is a C++  code.
  
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|-
 
|-
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| 06.13
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| 06.12
 
|'''namespace''' is also used here.
 
|'''namespace''' is also used here.
  
 
|-
 
|-
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|  06.19
+
|  06.18
 
|  Also, notice that the output statement in C++ is '''cout'''.
 
|  Also, notice that the output statement in C++ is '''cout'''.
  
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|-
 
|-
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| 06.42
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| 06.41
 
| Let's execute the code and see what results we get.
 
| Let's execute the code and see what results we get.
  
 
|-
 
|-
 
| 06.49
 
| 06.49
−
|Open the terminal and type  '''g++ arithmetic.cpp -o arith'' .'''Press Enter'''
+
|Open the terminal and type  '''g++ space arithmetic dot cpp space  minus o arith'' .'''Press Enter'''
  
 
|-
 
|-
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|-
 
|-
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| 07.17
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| 07.16
 
| Here the output is displayed:  
 
| Here the output is displayed:  
 
   
 
   
 
|-
 
|-
 
| 07.19
 
| 07.19
−
|So, we see that  the results are similar to C program.
+
|So, we see that  the results are similar to the C program.
  
 
|-
 
|-
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|-
 
|-
−
|  07.30
+
|  07.29
 
|  Let us now summarize the tutorial.  
 
|  Let us now summarize the tutorial.  
  
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|-
 
|-
−
|  07.37
+
|  07.36
 
|  As an assignment:
 
|  As an assignment:
  
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|-
 
|-
−
| 07.43
+
| 07.42
 
|Please note that Modulus operator finds the remainder of division.  eg. c = a % b;
 
|Please note that Modulus operator finds the remainder of division.  eg. c = a % b;
  
 
|-
 
|-
−
| 07.51
+
| 07.50
 
|You should obtain the result as 1.
 
|You should obtain the result as 1.
  
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|-
 
|-
−
| 07.58
+
| 07.57
 
|It summarises the Spoken Tutorial project  
 
|It summarises the Spoken Tutorial project  
  
 
|-
 
|-
−
| 08.01
+
| 08.00
 
|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  
  
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|-
 
|-
−
| 08.10 
+
| 08.09
 
| Gives certificates for those who pass an online test  
 
| Gives certificates for those who pass an online test  
  
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| 08.14
 
| 08.14
 
| For more details, please write to contact at spoken hyphen tutorial dot org  
 
| For more details, please write to contact at spoken hyphen tutorial dot org  
−
 
  
  
 
|-
 
|-
−
|  08.21
+
|  08.20
 
| 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  
 
|-
 
|-
 
| 08.25
 
| 08.25
 
| 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
 +
 
  |-
 
  |-
−
| 08.31
+
| 08.30
 
| More information on this Mission is available at  
 
| More information on this Mission is available at  
 +
 
|-
 
|-
 
| 08.33
 
| 08.33

Revision as of 12:34, 5 February 2014

Time' Narration


00.01 Welcome to the spoken tutorial on Arithmetic Operators in C 'C++'.
00.07 In this tutorial, we will learn about
00.10 Arithmetic operators like



00.11
Addition: eg. a+b.
00.14
00.18 / Division: eg. a/b.
00.20 * Multiplication: eg. a*b.
00.24  % Modulus: eg. a%b.
00.27 To record this tutorial, I am using:Ubuntu 11.10 as the operating system
00.32 gcc and g++ Compiler version 4.6.1 in Ubuntu.
00.38 I will now demonstrate the use of these arithmetic operations with the help of a C program.
00.44 I have already written the program.
00.47 So I will open the editor and explain the code.
00.49 Here is the C program for arithmetic operators.
00.56 the first two statements the variables are declared and defined.
01.02 In the next two statements,
01.04 a is assigned the value of 5.
01.06 b is assigned the value of 2.
01.10 Now let's see how the addition operator works.
01.14 c holds the sum of a and b.
01.19 This printf statement displays the sum of a and b on the screen.
01.28 Here % dot 2f provides the precision of two digits after the decimal point.
01.37 In the next statement, c holds the product of a and b.
01.43 This printf statement displays the product of a and b on the screen.
01.48 Let's see how these two operators work.
01.52 We will comment out the following lines
01.55 Type /*
02.01 */
02.05 Click on 'Save
02.07 Save the file with extension .c
02.10 I have saved my file as arithmetic.c
02.15 Open the terminal window by pressing Ctrl, Alt and T keys simultaneously.
02.22 To compile the code, type the following on the terminal.
02.27 gcc space arithmetic dot c space minus o space arith
02.38 Press Enter
02.40 To execute the code, type ./arith
02.48 press Enter
0250 The output is displayed on the screen.
02.53 It shows,
02.54 Sum of 5 and 2 is 7.00 and
02.59 Product of 5and 2 is 10.00
03.03 Now you should try the subtraction operator on your own
03.08 Try replacing the addition operator with subtraction operator.
03.13 You should get the result as 3.
03.18 Coming back to the program and the last set of statements.
03.23 Now, I will explain the code for division.
03.26 Remove the multi line comments here and here.
03.34 In these statements, c holds the value of integer division of a by b.
03.40 Please note that in integer division the fractional part is truncated.
03.47 The printf statement displays the division output on the screen.
03.57 In this statement we are performing real division.
04.02 Here one of the operands has to be cast as float
04.10 We have type-cast variable a.
04.13 Now a will behave as a float variable for a single operation.


04.22 The printf statement displays the output of real division on the screen.


04.30 Type return 0 and close the ending curly bracket.
04.37 Click on Save.
04.40 Coming back to the terminal to compile and execute the code.
04.45 To compile, typegcc space arithmetic dot c minus o space arith. Press Enter
04.59 To execute the code, type ./arithPress Enter


05.05 The output is displayed on the screen:
05.08 We have the previous outputs of addition and multiplication operators.
05.16 we have the integer Division of 5 by 2 is 2.


05.22 We can see that in integer division the fractional part is truncated.


05.29 then we have the real division of 5 by 2 is 2.5.
05.35 In real division the result is as expected.
05.37 We used type-casting to obtain these result.
05.45 Now suppose, I want to write the same program in C++.
05.50 Let see if i can use the same code in C++, too?
05.54 Let's find out.
05.56 Let me go back to the editor.
06.00 Here is a C++ code.
06.05 Notice that the header is different from the C file header.
06.12 namespace is also used here.
06.18 Also, notice that the output statement in C++ is cout.
06.25 So, apart from these differences, the two codes are very similar.
06.32 Click on Save.
06.33 Make sure the file is saved with the extension .cpp
06.37 I have saved my file as arithmetic.cpp
06.41 Let's execute the code and see what results we get.
06.49 Open the terminal and type g++ space arithmetic dot cpp space minus o arith .'Press Enter
07.09 To execute the code Type ./ arithPress Enter


07.16 Here the output is displayed:
07.19 So, we see that the results are similar to the C program.
07.23 The only difference is in the precisions of outputs.
07.29 Let us now summarize the tutorial.
07.32 In this tutorial we learnt how to use the arithmetic operators.
07.36 As an assignment:
07.38 Write a program to demonstrate the use of modulus operator.
07.42 Please note that Modulus operator finds the remainder of division. eg. c = a % b;
07.50 You should obtain the result as 1.
07.55 Watch the video available at the following link
07.57 It summarises the Spoken Tutorial project
08.00 If you do not have good bandwidth, you can download and watch it


08.05 The Spoken Tutorial Project Team . Conducts workshops using spoken tutorials
08.09 Gives certificates for those who pass an online test
08.14 For more details, please write to contact at spoken hyphen tutorial dot org


08.20 Spoken Tutorial Project is a part of the Talk to a Teacher project
08.25 It is supported by the National Mission on Education through ICT, MHRD, Government of India
08.30 More information on this Mission is available at
08.33 spoken hyphen tutorial dot org slash NMEICT hyphen Intro


08.41 This is Ritwik Joshi from IIT Bombay.

Thank you for joining.

Contributors and Content Editors

Ashwini, Krupali, PoojaMoolya, Pratik kamble, Sandhya.np14

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