Nancyvarkey at 11:22, 22 September 2014

2014-09-22T11:22:01Z

Ashwini at 09:37, 22 September 2014

2014-09-22T09:37:49Z

Ashwini: Created page with "'''Title of script''': '''Command Line Arguments''' '''Author: '''Ashwini Patil '''Keywords: '''Video tutorial,''' '''Command Line Arguments, main() {| style="border-spac..."

2014-09-22T07:55:08Z

Created page with "'''Title of script''': '''Command Line Arguments''' '''Author: '''Ashwini Patil '''Keywords: '''Video tutorial,''' '''Command Line Arguments, main() {| style="border-spac..."

New page

'''Title of script''': '''Command Line Arguments'''

'''Author: '''Ashwini Patil

'''Keywords: '''Video tutorial,''' '''Command Line Arguments, main()

{| style="border-spacing:0;"
! <center>Visual Cue</center>
! <center>Narration</center>

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Hello and welcome to the spoken tutorial on''' Command Line Arguments.'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial, -we will learn about

* '''main function with arguments with an exampleWhat does this line mean<br/> Correct the sentence.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide

'''System Requirements'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| For this tutorial I am using

* '''Ubuntu Linux 12.04''' '''OS''' and
* '''gcc Compiler version 4.6.1 on Ubuntu'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide

'''Prerequisites'''

'''spoken-tutorial.org '''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| To follow this tutorial you should be familiar with C tutorials.

If not, for relevant tutorials please visit''' spoken hyphen tutorial dot org.'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Show the pointer to '''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us start with our program.

I have a code file.

I will open it.

Filename is '''main-with-args.c'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the program.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| <nowiki>#include <stdio.h> </nowiki>

<nowiki>#include <stdlib.h> </nowiki>
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| These are the header files.

'''stdio.h '''defines core input and output functions.

'''stdlib.h''' header file defines,

* Numeric conversion function.
* Pseudo-random numbers.
* Generation function.
* Memory allocation.
* Process control functions.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''int main(int argc, char **argv)'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This is our main function.

Inside this we have passed two arguments.

'''int argc, char **argv'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| int main(int argc, char **argv)
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''“argc”''' refers to the number of command line arguments passed to the program.

This includes the actual name of the program.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Argv''' contains actual arguments.

Starting from index 0.

Index 0 is the name of the program.

Index 1 will be the first argument passed to the program.

Index 2 will be the second argument passed to the program.

And so on.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''printf("argc is %d\n",argc); '''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This statement will display the total number of arguments passed to the program.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| <nowiki>[highlight]</nowiki>

'''<nowiki>printf("argv is %s\n",argv[1]);</nowiki>'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This will display the 1st argument passed to the program.

1 represents the argument at index 1.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| <nowiki>[highlight]</nowiki>

'''while(argc--)'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| While condition will decrement the number of arguments.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| <nowiki>[highlight again!!]</nowiki>

'''printf("arguments are %s\n", *argv++);'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This statement will print all the arguments passed to the program.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''return 0;'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| At the end we have''' return 0 '''statement'''.'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Press '''Ctrl+Alt+T'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let us open the terminal by pressing '''Ctrl+Alt+T''' keys.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Compile'''

'''Type: gcc main-with-args.c -o args'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type:''' gcc main-with-args.c -o args'''

Press''' Enter'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Execute'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Type:''' ./args'''

Press''' Enter'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Point to the output on the Terminal'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| You can see the output as:

'''Total number of arguments are 1 '''

'''The first argument is (null) '''

'''arguments are ./args '''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Command line arguments '''are given during execution.

'''Total number of arguments are''' '''1''' as the zeroth argument is the executable filename itself.

'''The first argument is (null) '''as we have not passed any argument to the program.

Arguments are only one ie. '''./args'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Highlight:'''

Type:

'''./arg.sh Sunday Monday Tuesday'''

| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now let us execute again

Type at the terminal: '''./args Sunday Monday''' '''Tuesday'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''(change in your program also)'''
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We see the output as:

'''Total number of arguments are 4 '''

'''The first argument is Sunday '''

'''Argument is ./args Week days start with capital letters you can type them as I corrected''Reply to Madhuri (17/07/2014, 12:05): "..."''

'''Ok'''

'''Argument is Sunday '''

'''Argument is Monday '''

'''Argument is Tuesday '''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Let me explain the output.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''Output:'''

| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Total number of arguments are 4 '''as '''./args, Sunday, Monday,Tuesday.'''

'''The first argument is Sunday '''

The '''zero'''th argument always gives “executable filename”

'''Sunday''' is assigned to '''first argument''' .

'''Monday '''is assigned to '''second argument.'''

'''Tuesday '''is assigned to '''third argument'''

This brings us to the end of this tutorial.

Let us summarize.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display slide

Summary
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial we learnt,

* '''Command line arguments'''
* '''argc'''
* '''argv'''

Slide is not as the script''Reply to Madhuri (18/07/2014, 11:04): "..."''

'''It is same.'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Assignment
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| As an assignment,

* Execute the program with different arguments.

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide

| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Watch the video available at the link shown below

It summarises the Spoken Tutorial project

If you do not have good bandwidth, you can download and watch it

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide

Spoken Tutorial Workshops
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

Conducts workshops using spoken tutorials

Gives certificates to those who pass an online test

For more details, please write to

'''contact@spoken-tutorial.org'''

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide

Acknowledgement
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Spoken Tutorial Project is a part of the Talk to a Teacher project

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

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

|-
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| This is Ashwini Patil from IIT Bombay signning off.

Thank you for joining.

|}

@@ Line 17: / Line 17: @@
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| Display Slide
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial, -we will learn about
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| In this tutorial, we will learn about
-* '''main function with arguments with an exampleWhat does this line mean<br/> Correct the sentence.
+* '''main function with arguments with an example'''
@@ Line 29: / Line 29: @@
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| For this tutorial I am using
-* '''Ubuntu Linux 12.04''' '''OS''' and
+* '''Ubuntu Operating system version 11.10''' and
 * '''gcc Compiler version 4.6.1 on Ubuntu'''
@@ Line 189: / Line 189: @@
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now let us execute again
-Type at the terminal: '''./args Sunday Monday''' '''Tuesday'''
+Press the uparrow key space Monday space Tuesday
 |-
 | style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:none;padding:0.097cm;"| '''(change in your program also)'''
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| We see the output as:
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| Now we can see the output as:
 '''Total number of arguments are 4 '''
@@ Line 199: / Line 201: @@
 '''The first argument is Sunday '''
-'''Argument is ./args Week days start with capital letters you can type them as I corrected''Reply to Madhuri (17/07/2014, 12:05): "..."''
+'''Argument is ./args '''
-−
-'''Ok'''
-−
-−
-−
 '''Argument is Sunday '''
@@ Line 221: / Line 218: @@
-| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Total number of arguments are 4 '''as '''./args, Sunday, Monday,Tuesday.'''
+| style="border-top:none;border-bottom:1pt solid #000000;border-left:1pt solid #000000;border-right:1pt solid #000000;padding:0.097cm;"| '''Total number of arguments are 4 '''as '''./args, Sunday, Monday and Tuesday.'''
 '''The first argument is Sunday '''
@@ Line 248: / Line 245: @@
 * '''argv'''
 |-

Advance-C/C2/Command-line-arguments-in-C/English - Revision history

Nancyvarkey at 11:22, 22 September 2014

Ashwini at 09:37, 22 September 2014

Ashwini: Created page with "'''Title of script''': '''Command Line Arguments''' '''Author: '''Ashwini Patil '''Keywords: '''Video tutorial,''' '''Command Line Arguments, main() {| style="border-spac..."