C / C++ / MFC

conversion operator ??? Plz help .........

11-Aug-07 6:35

hxhl95 wrote:
What's MAX_PATH?

See here[^], and also check your Include folder.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Zealous_Me9-Aug-07 7:37

9-Aug-07 7:37

How does a conversion operator works ?
Why it is created with overloading keyword "operator" ?
Why it does not have a return type, while with the "operator" keywork we have to have mention a return type ????

Please, all the gentlemen here, help me, i am trying to hone my C++ programming skills to a good level.

led mike9-Aug-07 8:08

led mike

9-Aug-07 8:08

Zealous_Me wrote:
i am trying to hone my C++ programming skills to a good level.

Why do you think forum based messages are an appropriate way to do that?

IMHO you would be better served working some tutorials and/or reading some books.

Zealous_Me9-Aug-07 8:32

9-Aug-07 8:32

Hey if u don't know the answer then don't waste my time, and let somebody with enough knowledge to come up and respond. for your kind information i have read enough of my book ->>BY-> Robert Lafore but I couldn't find an answer thats why I put it here.

led mike9-Aug-07 9:08

led mike

9-Aug-07 9:08

Zealous_Me wrote:
i have read enough of my book

Also see Effective C++ series by Scott Meyers

Zealous_Me10-Aug-07 8:57

Re: Good luck in the future!

10-Aug-07 8:57

Thank you for suggesting me good book. I'll definitely consult the book. and I am sorry if my answer was rude to you.

Good luck in the future!

leckey9-Aug-07 9:48

leckey

9-Aug-07 9:48

I looked at some of your old posts and you gave this rude answer before ("don't waste my time"). When you are rude to higher-up members chances are you'll be blacklisted and no one will answer your questions. So good luck on that one.

_____________________________________________
Flea Market! It's just like...it's just like...A MINI-MALL!

Zealous_Me10-Aug-07 8:55

10-Aug-07 8:55

Hey thanks for the suggestion dude !! well, actually i wanna hone my coding skills at a fast rate and I put up a question only when i do not find an answer myself after long hard work. but, after putting the question up here i always look get an answer but in return if I get an answer of "look in some book" or "do some tutorials" then u tell who'll not go mad at such a reply.
I don't wanna waste anyone else's time and also my time, thats why I come up with a question when I have done enough to find an answer with my level of knowledge.
Well, thank you for warning me and I'll be careful to not to react if someone gives me answers that are not at all useful.

jhwurmbach9-Aug-07 22:43

jhwurmbach

9-Aug-07 22:43

Stop shouting at others until you have read Effective C++ and More Effective C++ by Scot Myers.

"I have read enough of my book" does not sound very promising, though. Sigh | :sigh:

Though I speak with the tongues of men and of angels, and have not money, I am become as a sounding brass, or a tinkling cymbal.
George Orwell, "Keep the Aspidistra Flying", Opening words

Mark Salsbery9-Aug-07 8:33

Mark Salsbery

9-Aug-07 8:33

Conversion functions provide a way to explicitly convert an object of a type to another type.

Zealous_Me wrote:
Why it is created with overloading keyword "operator" ?

Probably because conversions are done using a "casting operator" - parenthesis "()"

Zealous_Me wrote:
Why it does not have a return type, while with the "operator" keywork we have to have mention a return type ????

This is a matter of the chosen syntax. Bjarne would know best, but I imagine the syntax is this way to differentiate the
conversion function from a function call operator.

For example, the syntax could have been chosen to be

type operator()

but a function call operator looks like this:

type operator()([optional arguments])

Having the syntax for a conversion function like this:

operator type()

seems more clear to me that it's a "cast operator" to "type".

As led mike suggested, reading is good -Operator Overloading[^]

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

led mike9-Aug-07 9:08

led mike

9-Aug-07 9:08

Mark Salsbery wrote:
As led mike suggested, reading is good

Apparently my answer was not good Wink | ;)

Mark Salsbery9-Aug-07 9:15

Mark Salsbery

9-Aug-07 9:15

It wasn't you - apparently "Robert Lafore"'s answers aren't good Roll eyes | :rolleyes:

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

http://www.acm.org/crossroads/xrds3-1/ovp3-1.html[^]
http://www.literateprogramming.com/string.pdf[^]
http://www.cs.lth.se/EDA031/forelasningar/cppoh3.pdf[^]
http://www.cs.uoregon.edu/~yannis/fc++/fc++.main.pdf[^]

Russell^'9-Aug-07 8:35

Russell^'

9-Aug-07 8:35

some links, thery and examples (very good to answer to every your questions): Wink | ;)

Russell

RE: adding a button in a application

itsgood1239-Aug-07 5:11

9-Aug-07 5:11

Hello Everyone,

I want to add a button in a application.Application reads images and I want this button to do labeling for the image being read.

Can anyone please give me some idea like how to start with?Actually,I am a beginner in VC++.I would appreciate any kind of help.Thanking You in advance.

Regards,
Ravan

toxcct9-Aug-07 5:12

toxcct

9-Aug-07 5:12

open your resource editor, drag n' drop the button control, and there you go...

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

David Crow9-Aug-07 5:30

9-Aug-07 5:30

raavn wrote:
I want to add a button in a application.

So just add the button control like you would any other control.

raavn wrote:
...I want this button to do labeling for the image being read.

Which means what exactly?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

itsgood1239-Aug-07 11:28

9-Aug-07 11:28

Hi david,

Thanx a lot for replying.
Actually, I have already a software that loads DT files and after that these files are segmented for tumor and ventricles.What I wanna to do is add a button to this existing software.I wanna this button to do labeling on that medical image.For example,I wawant to write vetricles when ventricles appear on slice.Actually, this software was developed by some other person.I jus wanna to add this feature to this existing software.

Can u plz give me guidelines to implement this idea?I have very little knowledge of VC++.

Thanks & Regards,
Ravan

David Crow10-Aug-07 2:52

10-Aug-07 2:52

raavn wrote:
What I wanna to do is add a button to this existing software.

Do you have the source code?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

itsgood12310-Aug-07 3:51

10-Aug-07 3:51

Yeah,I hv the source code.

David Crow10-Aug-07 4:02

10-Aug-07 4:02

Ok, so just add the button control like you would any other control. Open the resource editor, double-click the dialog template you want to modify, click on the button in the control toolbox and drag it onto the dialog template.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

itsgood12314-Aug-07 11:11

14-Aug-07 11:11

hi david,
thnx 4 help....bt i need more help...i hv done wat u said 2 do...next i wnna dat wen i il click dis button,den a cusor shud b displayed on d image so dat i can write text on d image....dis s/w is already hving a SAVE button...so aftr writing wen i il click save button,it shud save dat text....
Can u plz give me some idea like how 2 start wid?I wud really appreciate dat..

Thnks & Regards

David Crow15-Aug-07 2:42

15-Aug-07 2:42

I stopped reading after the first sentence. Please lose the SMS-speak and use proper English.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

David Crow15-Aug-07 3:40

15-Aug-07 3:40

So what are you needing help with? Responding to a button click? Writing text onto an image? Saving text? Be specific.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

itsgood12315-Aug-07 5:53