just for info

[Aashi]

hi all,

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





thanks!!!

[laserlight]

A using directive:

using namespace std;

A using declaration:

using std::cout;

[Aashi]

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?

[ninja9578]

I call those preprocessor directives, as does gcc

[Aashi]

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

[Lindley]

what would be the difference?

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.

[laserlight]

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?

Sorry, I don't understand your question.

how to define a class?

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

[Austin.Soucy]

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