VB to C++ Conversion

[NOMADMAN]

I know VB, well to very well, but I don't know C++ that well.
I have Newbie knowledge of C++...

In VB you can declare Types

Type WHATEVER
     A as Integer
     B as Boolean
     C as String
End Type

you get the idea! How is this done in C++? Can it be done?

Also, second question, I've heard the words Class, Method, Objects... how does this all fit togeter. Like are classes methods of something. Methods have classes in them? I dunno.

Could some one clear this up?

Thanks

NOMAD

[ZanM]

what we call a type in vb is called a structure in c++ and that is what it realy is in vb

Type SomeType
    A as Integer
    B as Integer
End Type

in C++ it looks like this

struct SomeStruct {
    int a;
    int b;
};

they are basicly the same thing and they both use dot syntax ie

Dim mType as SomeType
mType.A = 450

 SomeStruct mStruct;
mStruct.a = 450

thats it basicly for types and structs

before i even start to explain the relation between vb classes and c++ classes you should be sure you understand encapsulation, code reuse and the general concepts of COM not really a copmlete understanding of COM in VB is necesary but it helps things to be clear as to if you need a class or not. do you have something that you need to maintain info on or that needs to be able to do things for itself that couldn't be done to a function call that was common to the whole application and not just to an instance of the object's class

if you think you understand classes in vb thier properties and methods i will take the time to make an example but if you aren't sure so so because you'll be lost if you don't understand let,get,set, public, private and friend as they work within a vb class

[CornedBee]

He doesn't ask about COM or the special things of VB classes but about OOP in general. And I suggest he uses a C++ tutorial to find out about it (see topmost post)

[parksie]

Originally posted by ZanM

Type SomeType
    A as Integer
    B as Integer
End Type

in C++ it looks like this

struct SomeStruct {
    int a;
    int b;
};

Uh...it's not int, it's short. In VB an Integer is only two bytes

[CornedBee]

That's ok, but again datatype mistake.
C float == VB Single (4 bytes)
VB Double = C double (8 bytes)

[ZanM]

maybe i should learn more about not being a newbie myself before i try to tech others, i'm used to it being called a float in vb books

[CornedBee]

Well, that's naming:
VB:
Single = single precision floating point number
Double = double precision floating point number
C:
float = floating point number
double = double precision floating point number