just for info

hi all, :)

Can anyone tell me the difference between using directive and using declaration? (with syntax as an example) :)





thanks!!!

A using directive:

Code:

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using namespace std;

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A using declaration:

Code:

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using std::cout;

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thanks laserlight :)
but every time, it confuses me, what are those #define statements are?? i mean in what sense does it called and used for?

I call those preprocessor directives, as does gcc

ok, :)
i want to ask another question and is: a class is basically, a data type that user defines then when a a variable is declared with some data type. So, what would be the difference? how to define a class?

thanks :)

Quote:

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Originally Posted by Aashi

what would be the difference?

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The difference between what? using statements and classes? #defines and classes? All three of those are totally unrelated things. There isn't really a comparison to be drawn.

It's like asking what's the difference between the color yellow and a cement truck.

Quote:

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Originally Posted by Aashi

i want to ask another question and is: a class is basically, a data type that user defines then when a a variable is declared with some data type. So, what would be the difference?

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Sorry, I don't understand your question.

Quote:

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Originally Posted by Aashi

how to define a class?

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You gave such an example yourself in this thread: access private data members.

Quote:

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Originally Posted by lindley

it's like asking what's the difference between the color yellow and a cement truck.

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:lol: