Sneha at 09:22, 22 February 2013

2013-02-22T09:22:49Z

Sneha at 09:21, 22 February 2013

2013-02-22T09:21:42Z

Sneha: Created page with ' {| style="border-spacing:0;" ! Visual Cue ! Narration |- | 00.02 | | Welcome to the spoken tutorial on First C program. |- | 00.06 | In this tutorial, we will learn |- | …'

2013-02-22T09:21:16Z

Created page with ' {| style="border-spacing:0;" ! Visual Cue ! Narration |- | 00.02 | | Welcome to the spoken tutorial on First C program. |- | 00.06 | In this tutorial, we will learn |- | …'

New page

{| style="border-spacing:0;"
! Visual Cue
! Narration

|-
| 00.02
| | Welcome to the spoken tutorial on First C program.

|-
| 00.06
| In this tutorial, we will learn

|-
| 00.08
| How to write a simple C program

|-
| 00.11
| How to compile it

|-
| 00.13
| How to execute it

|-
| 00.14
|We will also explain some common errors and their solutions.

|-
|00.19
| | To record this tutorial, I am using

|-
| 00.22
|Ubuntu operating system version 11.10 and gcc Compiler version 4.6.1 on Ubuntu

|-
| 00.31
| To practice this tutorial,

|-
| 00.33
|You should be familiar with Ubuntu Operating System and an Editor

|-
| 00.39
|Some editors are vim and gedit

|-
| 00.42
|I will use gedit in this tutorial

|-
| 00.46
|For relevant tutorials please visit our website: [http://spoken-tutorial.org/ http://spoken-tutorial.org]

|-
|00.51
| Let me tell you how to write a C program through an example

|-
| 00.56
|Open the terminal window by pressing '''Ctrl, Alt and T '''keys simultaneously on your keyboard.

|-
| 01.07
| Now let's open the text editor. So, at the prompt, type

|-
| 01.12
|'''“gedit”''' space '''“talk”''' dot '''“c”''' space “&”'''

|-
| 01.20
|'''We use ampersand (&) to free up the prompt '''

|-
| 01.25
| Please note that all the '''C''' files will have extension dot '''“c”'''

|-
|01.31
| Now Press '''Enter'''

|-
| 01.33
| the text editor has opened

|-
| 01.37
| Let us start to write a program

|-
| 01.39
| Type double slash '''“//”''' space

|-
| 01.42
|'''“My first C program”.'''

|-
|01.48
| Here, double slash is used to comment the line

|-
| 01.52
|Comments are used to understand the flow of program

|-
| 01.56
|It is useful for documentation

|-
| 01.58
|It gives us information about the program

|-
| 02.01
|The double slash is called as single line comment.

|-
| 02.07
| Now press '''Enter'''

|-
|02.09
|Type hash '''“#include”''' space opening bracket , closing bracket'''

|-
| 02.17
| It is always a good practice to complete the brackets first, and then start writing inside it

|-
| 02.24
| Now Inside the bracket, type'''“stdio”''' dot”.” “'''h” '''

|-
| 02.30
| '''stdio.h''' is a '''header file'''

|-
| 02.34
|A '''program''' must contain this header file when it uses standard '''input/output functions'''.Now press Enter

|-
| 02.43
| type '''“int” '''space''' “main” '''opening bracket,
closing bracket '''“()”. '''

|-
| 02.50
| | ' '''main''' is a special '''function'''
|-
| 02.53
|It denotes that the execution of the program begins from this line

|-
| 02.58
|The opening bracket and closing bracket is called as parenthesis.

|-
| 03.04
| Parenthesis followed by '''main''' is to tell the user that '''main''' is a '''function'''

|-
| 03.11
| Here the '''int''' '''main function''' takes no '''arguments'''

|-
| 03.15
|It returns a value of type '''integer'''.

|-
| 03.19
| We will learn about '''data types''' in another tutorial.

|-
| 03.23
| Now Let us switch to the slides to know more about '''main function'''. Let us go to the next slide.

|-
| 03.30
| Every '''program'''should have one main function

|-
| 03.33
|There should NOT be more than one main function

|-
| 03.37
|Otherwise the compiler cannot locate the beginning of the program

|-
| 03.41
|The empty pair of parentheses indicates that main has no '''arguments'''

|-
| 03.47
|The concept of arguments will be discussed in detail in the upcoming tutorials.

|-
| 03.52
| Now let us come back to our program. Press Enter.

|-
| 03.58
| Type opening curly brace '''“{”'''

|-
| 04.00
|The opening curly bracket marks the beginning of the '''function''' '''main'''.

|-
| 04.05
|Then Type closing curly bracket '''“}”'''

|-
| 04.08
|The closing curly bracket indicates the end of the '''function''' '''main'''.

|-
| 04.13
| Now Inside the bracket

|-
| 04.14
|press '''Enter''' twice, move the cursor one line up

|-
| 04.20
| Indentation makes the code easier to read

|-
| 04.23
|It also helps to locate errors faster

|-
| 04.26
|So let us give three space here

|-
| 04.29
| And Type''' “printf” ''' opening bracket closing bracket '''“()” '''

|-
| 04.34
|'''printf '''is a standard C function to print the output on the terminal

|-
| 04.39
| Here inside the brackets, within double quotes,

|-
| 04.44
|Anything within the double quotes in the printf statement will be printed on the terminal.

|-
| 04.50
|Type'''“Talk To a Teacher '''backslash '''n”'''

|-
| 05.00
|Backslash n '''“\n” '''signifies newline

|-
| 05.03
|As a result, after execution of the '''printf '''function, the cursor moves to the new line

|-
| 05.11
| Every '''C''' statement must end with a '''semicolon “;”'''

|-
| 05.15
|Hence, type it at the end of this line.

|-
| 05.19
|'''Semicolon''' acts as a statement terminator.

|-
|05.24
|Now press '''Enter''' give three space here

|-
|05.28
| And type '''“return”''' space''' “0”''' and a '''semicolon''' '''“;”'''

|-
| 05.34
| This statement returns the integer zero

|-
| 05.38
|An integer has to be returned for this function because the function type is '''int'''

|-
| 05.45
|The '''return''' statement marks the end of executable statements

|-
| 05.51
|We will learn more about the returned values in another tutorial.

|-
| 05.56
| Now click on"'''Save'''" button to save the file

|-
| 06.00
|It is a good habit to save files frequently

|-
| 06.03
|This will protect you from sudden power failures

|-
| 06.06
|It will also be useful in case the applications were to crash.

|-
| 06.11
| Let us now compile the program come back to a terminal.

|-
| 06.15
|Type '''“gcc”''' space '''“talk.c”''' space hyphen “-'''o”''' space '''“myoutput”'''

|-
| 06.24
| '''gcc''' is the compiler

|-
| 06.27
|'''talk.c''' is our filename .
|-
| 06.30
|'''-o''' '''myoutput''' says that the executable should go to the file '''myoutput'''

|-
| 06.37
| Now Press''' Enter. '''

|-
| 06.39
|We see that the program is compiled

|-
| 06.42
|By typing '''ls -lrt''', we can see that '''myoutput''' is the last file to be created

|-
| 06.54
|To execute the program, type dot slash '''“./myoutput” ''' press '''Enter.'''

|-
|07.01
| Here the output is displayed as '''“Talk To a Teacher”.'''

|-
| 07.06
| As I said before, return is the last statement to be executed

|-
| 07.10
|Thus after the return statement nothing will be executed. Let us try it out.

|-
|07.16
| come back to our program.

|-
| 07.17
| After the '''return''' statement, let us include one more printf statement type printf("Welcome \n");

|-
| 07.35
| Now click on save.

|-
| 07.37
|Let us compile and execute come back to our terminal.

|-
|07.41
| you can recall the previously entered commands by using '''up arrow'''key.

|-
| 07.46
|That is what I did now

|-
| 07.51
|We see that the second statements '''welcome''' is not executed

|-
| 07.58
| Now come back to our program

|-
| 08.00
|Let us write the 'Welcome' statement above the return statement

|-
| 08.07
| Click on Save.

|-
| 08.09
|Let us compile and execute

|-
| 08.15
|We see that the second '''printf''' statement ''welcome'' has also has been executed

|-
| 08.23
| Now let us see the common errors which we can come across. Come back to our program.

|-
| 08.29
| Suppose here I will the miss the dot in '''“stdio.h”''' Click on save.

|-
| 08.35
| Let us compile and execute .

|-
| 08.42
|We see that

|-
| 08.43
|There is a fatal error at line no.2 in our '''talk.c''' file.

|-
| 08.48
|The compiler cannot find a '''header file''' with the name '''“stdioh”'''hence it is giving an error no such file or directory.

|-
| 08.59
|And the compilation is terminated.
|-
| 09.03
|Let us now fix the error come back to a program Reinsert the dot '''“.”'''click on save

|-
| 09.11
| Let us compile and execute it.Yes It is working.

|-
| 09.19
| I will show you another common error

|-
|09.23
|Let us switch back to the program.

|-
| 09.26
| Now, suppose here i will miss the '''semicolon''' at the end of the line

|-
| 09.31
| Click on '''Save'''.Let us compile and execute

|-
| 09.42
| We see that there is an error at line no.6 in our talk.c file. That expected ''semicolon'' before printf.
|-
| 09.51
|Come back to our program. As i said before semicolon acts as a statement terminator

|-
| 09.59
|So it will search for it at the end of the line.5 and at the beginning of the line.6.

|-
| 10.07
| This is line 6

|-
| 10.09
| This is the last place where you can put the '''semicolon'''

|-
| 10.13
|Recall that the compiler also give the error message on line 6.

|-
| 10.18
| Let us try what happens if we put the semicolon here.

|-
| 10.24
| Click on '''Save''' .

|-
| 10.26
|Let us Compile and execute.Yes it is working

|-
| 10.33
|Now come back to our program. Let us type the ''semicolon'' here at the end of this line.

|-
| 10.41
| As it is a conventional practice to type the ''semicolon'' at the end of the line. Now click on save.

|-
| 10.49
| Let us Compile and execute. .Yes it is working.

|-
| 10.49
|Let us go back to our slides.

|-
|10.57
| As an Assignment

|-
| 10.59
|Write a program to print "Welcome to the World of C"

|-
| 11.03
|See what happens if '''“\n”''' is not included in the '''printf''' statement.

|-
| 11.09
| This brings us to the end of this tutorial

|-
| 11.12
| Watch the video available at the link shown http://spokentutorial.org/What\_is\_a\_Spoken\_Tutorial

|-
| 11.15
|It summarises the Spoken Tutorial project

|-
| 11.18
|If you do not have good bandwidth, you can download and watch it.

|-
| 11.22
| The Spoken Tutorial Project Team

|-
| 11.25
|Conducts workshops using spoken tutorials

|-
| 11.28
|Gives certificates to those who pass an online test

|-
| 11.32
|For more details, please write to contact [at] spoken hyphen tutorial dot org

|-
|11.38
| Spoken Tutorial Project is a part of the Talk to a Teacher project

|-
| 11.42
|It is supported by the National Mission on Education through ICT, MHRD, Government of India

|-
| 11.48
|More information on this Mission is available at: http://spoken-tutorial.org\NMEICT-Intro

|-
| 11.51
| This is Ashwini Patil from IIT Bombay. Thank you for joining.

|}

← Older revision		Revision as of 09:22, 22 February 2013
Line 1:		Line 1:
		+	{\| border = 1
		+
		+	\|'''Time''''
		+
		+	\|'''Narration'''

−	~~{\|Border=1"~~
−	~~! Visual Cue~~
−	~~! Narration~~

	\|-		\|-

@@ Line 1: / Line 1: @@
+{|Border=1"
-{| style="border-spacing:0;"
 ! Visual Cue
 ! Narration

C-and-C-Plus-Plus/C2/First-C-Program/English-timed - Revision history

Sneha at 09:22, 22 February 2013

Sneha at 09:21, 22 February 2013

Sneha: Created page with ' {| style="border-spacing:0;" ! Visual Cue ! Narration |- | 00.02 | | Welcome to the spoken tutorial on First C program. |- | 00.06 | In this tutorial, we will learn |- | …'