Declaring Variables (1 Viewer)

[velox]

I got some answer to this question, but its really dodgy

Some variables can be declared directly whereas others must have their structure define first. Why is this the cae? Explain using examples.
Any help is really appreciated

 

[Winston]

Give me an example of what ur saying... is this vb.net?

 

[velox]

Well its like, just a general question......its from a textbook. Sam d's to be precise.

 

[Winston]

I think he's refering to some variables can be defined directly because there pre-defined types, and at sometimes u gotta define your own types using structures.

 

[J0n]

Well, structured datatypes such as records (User Defined Types in VB, or Structs/Unions in C++), must have their structures defined first before they can be simply declared using their datatype.
e.g. if you made a coordinate datatype, in VB, you would do something like:
Type Coordinate
X As Long
Y As Long
End Type

Then somewhere else, you could simply state:
Dim MyCoordinate ass Coordinate

 

[velox]

but why do they have to have their structures defined first?

 

[Winston]

err because the type doesn't exist? and if you wanted a certain type, you'd have to define it obviously.

 

[velox]

lol what a stupid question Thanks guys