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

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|Arithmetic operators like
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| The output is displayed on the screen.
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|The output is displayed on the screen.
  
 
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|It shows,'''Sum of 5 and 2 is 7.00''' and  
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|'''Sum of 5 and 2 is 7.00''' and  
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| Now you should try the subtraction operator on your own.  
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| In these statements, '''c''' holds the value of integer division of '''a''' by '''b'''.
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|In these statements, '''c''' holds the value of integer division of '''a''' by '''b'''.
  
 
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| We have type-cast variable a.
 
| We have type-cast variable a.
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|Now '''a''' will behave as a float variable for a single operation.
 
|Now '''a''' will behave as a float variable for a single operation.
  
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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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| Also, notice that the output statement in C++ is '''cout'''.
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|Also, notice that the output statement in C++ is '''cout'''.
  
 
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| So, apart from these differences, the two codes are very similar.
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|So, apart from these differences, the two codes are very similar.
  
 
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|Make sure the file is saved with the extension '''.cpp'''.
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| Let us now summarize the tutorial.  
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|Let us now summarize the tutorial.  
  
 
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|  This is Ritwik Joshi from IIT Bombay.  
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|  This is Ritwik Joshi from IIT Bombay. Thank you for joining.  
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Latest revision as of 14:18, 24 March 2017

Time Narration
00:01 Welcome to the spoken tutorial on Arithmetic Operators in C And C++.
00:07 In this tutorial, we will learn about:
00:10 Arithmetic operators like '+' Addition: e.g. a+b.
00:14 '-' Subtraction: e.g. a-b.
00:18 '/' Division: e.g. a/b.
00:20 '*' Multiplication: e.g. a*b.
00:24 '%' Modulus: e.g. 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 In 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 /* (slash asterisk)
02:01 */
02:05 Click on Save.
02:07 Save the file with extension .c (dot 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 (dot slash arith).
02:48 press Enter.
02:50 The output is displayed on the screen.
02:53 It shows,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 multiline 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 ./arith. Press 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 results.
05:45 Now suppose, I want to write the same program in C++.
05:50 Let's 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.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 ./ arith. Press 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. e.g. 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 summarizes 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 to 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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