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pix_programmer wrote: What is the difference between C & C++?
See here.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
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Very good.
If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke
[My articles]
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Thank you.
"Real men drive manual transmission" - Rajesh.
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When we say C++ supports OOP, it also means that the C++ compiler understands and compiles the OOP syntax.
Since C does not understand OOP, you have to write all the code yourself.
For example, OOP call the constructor when an object is created.
This is nothing but calling a function just after allocating memory for a data type.
In C++ you simply have to write a constructor according to the rules of a constructor.
But in C, you have to write a function and call that in code.
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You don't need an object-oriented language to do object-oriented programming. Going back to C once after many years of C++, I noticed I was using typedefs more effecively, as a substitute for "class". You can also use static members in C to simulate the private members of a C++ class.
The Decorator design pattern (http://en.wikipedia.org/wiki/Decorator_pattern ) can be used to add inheritance to languages that don't have it, like C.
The basic idea is that the "virtual" methods of each "class" (typedef'd struct) have a function pointer that can be set to a function in a parent class. If the pointer is non-NULL, it's called to simulate inheritance.
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Alan Balkany wrote: You can also use static members in C to simulate the private members of a C++
class.
Not sure what that statement means.
Static in C is not equivalent to class members. On can use a struct in C to contain member variables.
If one wants to mimic 'private' (which I think is overkill) then one can use a struct whose scope is limited to the C file and which is allocated when a more globally visible struct (different one) is allocated.
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I meant static functions in C aren't visible outside the file they're declared in, which can be used to simulate private functions in C++.
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While you've got plenty of useful responses already I'd like to add the fact that early C++ compilers were in fact pre-compilers that translated C++ code into C code. However, these precompilers had a very hard time when it came to templates, and therefore these early C++ 'front-ends' were not able to support the full template syntax.
In view of your question, since Templates are not a neccessary concept for OOP, C can clearly be used for OOP. It is just, as others have already pointed out, not very well suited to it.
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hi,
how can i implement a dll for connecting the browser through proxy server in vc++
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This question is not very clear. Why do you think you need a DLL to achieve this, and exactly what problem are you trying to solve? Any half decent browser will be able to handle communication through a proxy transparently.
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Hi all. How can I know for sure if the user have pressed TAB or SHIFT + TAB in a MDI application ? I read something vague on internet, nothing clear. Thank you.
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Can GetKeyState[^] or GetAsyncKeyState[^] help?
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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I solved with GetAsyncKeyState Function.Thank you.
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Yourwelcome.
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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I use gsoap to create a proxy class to call my web service's interfaces, but now the methods return error 4 and 12.
I debug these errors and google that error for solution, but I cannot find. Can anyone tell me why the methods return these error?
modified 2-Apr-12 12:44pm.
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Which methods return the error codes? Please show an extract of your code and the values of your input parameters for the instances that fail.
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A method defined in the web service that will return a structure including an array memebers.
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yu-jian wrote: A method defined in the web service that will return a structure including an array memebers.
What exactly does that tell us?
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If the methods are in your code, you should know why they are returning 4 and 12.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
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Hi Developers,
I want to show the text "Add Photo" in a picture control, initially ( if no photo has attached to it ).
Can anyone told me about it.
Thanks in Advance.
Amrit Agrawal
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The simplest thing that comes to my mind is: make a picture that shows your text and place that into your picture control (loaded from resource e.g.). Wouldn't that work for you?
> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<
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The first thing to explain is what you mean by a picture control. Is this something you created yourself, a third party class or an MFC class?
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Yes this is a control created by myself.
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Amrit Agr wrote: Yes this is a control created by myself.
So how do you expect us to debug it for you without any idea of how it works?
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