Tutorial 2

				

 

Tutorial
 2- By: Amin Patel  
 
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Almost every time the teacher
 gives lesson in school, we might copy everything from
 the board or make notes over what is taught. There is
 a similar thing we call in c++, ‘Comments’.
 Comments can be used for different purposes.
 
·       
 The most obvious one, to recall the
 purpose of the code (Say you are referring to it after
 6 months, makes less sense then. If you don’t
 include a comment.)
 
·       
 Helps your computer teacher know what
 you have actually written. Just kidding.
 
·       
 Now this one is an unobvious reason.
 Sometimes after compiling you might want to
 remove some line just to see how your program works
 then, without deleting the actual code.
 
·       
 The final one, just a good programming
 style to express your thoughts.
 
 
 
 
 
Comments can be written anywhere
 in the program (Good Feature). They don’t effect
 your code, unless you comment out something by
 mistake. 
 
 
 
 
 
There are two types of comments:
 
 
 
 
 

C
 Style: 
 
 

/*
You can write anything that
makes sense here */
 
 
 
 
 
 
After the introduction of c++ it
 just become a norm for programmers to ‘Comment
 out’, huge parts of their code using this style.
 The initial part (/*) and the final part(*/) can be on
 separate lines.
 
  
 
 
 E.g.:
 


 


 

#include
 <iostream.h>
 int
 main()
{/*
cout<<
 “ This whole line gets, commented
 out!”;*/
}
 
 
 
 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
<Warning:
 The numbered indentation is not to be included with
 the code while typing. It is only for your
 convenience>
 
 
 
 
 
 
 
 
 

C++
 Style
 
 
 
 
 
 

//
After the 2 slashes, you can
type anything that makes sense.
 
 
 
 
 
 
This comment style is used more
 often these days but please note that if your comment
 sentence goes over many lines, please use // on each
 line at the beginning.
 
 
 E.g.:
 

 
 
 

#include
 <iostream.h>
 int
 main()
{
cout<<
 “How are you I am fine”;
//
 Line 4 will print 
//“How
 are you I am fine, to the screen.
//
 Notice that 
//I
 placed the 2 slashes on this line too.
}
 
 
 
 
 
 
 
 
 
 

 


 


 

 
 


 
Note:
If anything appears wrong, it is due to the incompatibility
of the browser.


 
For compiler compatibility issues
please refer to tutorial
3


 
Users
of Netscape have complained regarding misprinting of C++
style comments but I can't verify that since I use IE, but
kudos to the Netscape user helping me solve the endless
comments problem due to browser incompatibility. 
 


 



 

 

 


 
 <-- content_end-->

 
 


 


 


_______________________________________________________________________
  If you like this code please
give me a good message.  If you have gained some
knowledge from this tutorial please make me happy, by giving
me an “excellent rating”. That's all I ask.
_______________________________________________________________________
 Tutorial 2 - By: Amin Patel
 


 

 

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