Difference between revisions of "C-and-C++/C2/Arithmetic-Operators/English-timed"
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| − | |+ Addition: eg. a+b. | + | | + Addition: eg. a+b. |
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| 00.14 | | 00.14 | ||
| − | |- Subtraction: eg. a-b. | + | | - Subtraction: eg. a-b. |
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Revision as of 12:36, 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 | - Subtraction: eg. a-b. | |
| 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. |
