C++ Guide: Part 2

Dark Star

INCREMENT OPERATOR

++ Increases the value by one. If it is used before or after the variable.....

Code:

i++ means i=i+1; ++i means i+1=i;

Both the formula are very diff and can the whole output, i=i+1 means that incrementation is done after the value is called. But i+1=i; means incrementation is done before the value is called.
For e.g. :-

Code:

int i;
i=10;
i=i++;
cout<<i;

Here first the value is incremented then the value is printed and the output will come 11. But if the same program is written in a way like this:-

Code:

int i; i=10; cout<<i++;

Then the output will be 10 no incrementation will be done beacuse as I already told i++ means i=i+1
so the compiler will first print the value of i then it will increament.
Also the same program with diff result:--

Code:

int i; i=10; cout<<++i;

Here the output will be 11 incrementation will be done beacuse as I already told ++i means i+1=i
so the compiler will first increament the value then it will print the value of i.
Note:- The following topic is important if U have any problem then please ask...
For e.g: -

Code:

int i,j;
i=10;
j=i++;
cout<<i<<" "<<j;

Here the output will be 10 11 . Here the value of i is assigned to j then in the value of i there is post incrementation of 1 so the final value of i remains same and j is 11.
MULTIPlE INCREMENTS

SO after simple increment and decrement move into the second chamber of complicated increments this type of increment are rarely used in programs but they can be asked in the outputs so as a guider I have to tell everything .
These type of increments and decrements are used in same line and with same integar or diff integar..
For e.g. :-----

Code:

void main()
{
clrscr();
int x;
x=10;
cout<<x++<<" "<<++x;
getch();
}

In the above program there are 2 output in the same line and the integer is same so the output will go from left to right but the assigning of numbers will be from right to left..
As the initial value of x is 10 and for assigning heading from right the first thing is ++x means x+1=x
so the value become 11. Then there is x++ means x=x+1; so the comp will 1'st print the value then it will increment it so the value remains same as 11.
The final output is 11 11.
I am not going into deep of this because this is not too much important as far as I know. SO lets start the loop.

Sam RuleZ · 22-10-2006, 12:37 PM

Nice guide !

**bakuryu** · 22-10-2006, 01:45 PM

Quote:

i+1=i;

doesn't make any sense ..... and is logically incorrect.

a = i++;
// means :
// a = i;
// i = i + 1;

and a = ++i;
//means
// i = i + 1; (and not i+1 = i)
// a = i;

Quote:

(1)The loop will not get executed if the given condition becomes false.

or if the expression is numerically 0. Any number other than 0 is considered TRUE, 0 is considered FALSE

Quote:

(1)The loop will be executed till the condition is false the result will be presented as soon as the condition becomes false.

Only if there's no break statement inside the loop. And the control comes out of the loop when the condition evaluates to FALSE, rather than "result will be presented as soon as the condition becomes false."

luvrohit85 · 22-10-2006, 07:44 PM

from where do u get this c++ guide book online can please tell me the website so that i can download it..

Dark Star · 22-10-2006, 09:56 PM

Hey I had made it by my own beleive me

**Strider** · 30-10-2006, 07:13 PM

Keep it up shah.. Good work.. Kepp them coming

22-10-2006, 12:37 PM	#1
Sam RuleZ Senior Member (500+) Join Date: Jun 2006 Location: Mumbai. Age: 17 Posts: 505 Thanks: 6 Thanked 27 Times in 22 Posts Rep Power: 18	Nice guide ! __________________ "Its better to get burnt, than to fade away"-Kurt Cobain.

22-10-2006, 07:44 PM	#3
luvrohit85 Junior Member (25+) Join Date: Sep 2006 Age: 24 Posts: 64 Thanks: 7 Thanked 5 Times in 5 Posts Rep Power: 3	hello from where do u get this c++ guide book online can please tell me the website so that i can download it.. __________________ .RoHiTkUmAr.

30-10-2006, 07:13 PM	#5
Strider Founder Join Date: Nov 2005 Location: The Last City Zion! Posts: 3,876 Thanks: 370 Thanked 410 Times in 355 Posts Rep Power: 67 OS:	Keep it up shah.. Good work.. Kepp them coming __________________ Want to ask a question? Try This! A guide on how to post a question, reply to a post etc.

Article Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Article	Article Starter	Category	Comments	Last Post
IE7 Cache, Part 2	BruceD	Internet Explorer	2	28-08-2007 08:06 PM
IE7 Cache, Part 2	BruceD	Internet Explorer	0	28-08-2007 07:57 PM
Re: I am Amazed - Part 33 1/3	MarkyMarc43	Windows Vista All	1	17-08-2007 07:34 PM
I am amazed part 2....	Tiberius	Windows Vista All	9	17-08-2007 07:32 PM
Re: I am Amazed - Part 33 1/3	Homer Schwartz	Windows Vista All	0	17-08-2007 07:21 PM

22-10-2006, 09:56 PM	#4
Dark Star Elite Member (1000+) Join Date: May 2006 Location: /dev/had0 Age: 20 Posts: 1,627 Thanks: 98 Thanked 172 Times in 146 Posts Rep Power: 45 OS:	Hey I had made it by my own beleive me

New To Site?	Need Help?
Register to Participate Meet our Staff Refer Forum Rules Contact Us	Frequently Asked Questions Did you forget your password?

C++ Guide: Part 2

Guides