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Struct Initialization Within Struct

Started by pixelartist Jun 17, 2012 at 7:11 PM 1 replies 1.7k views

Original Post

Jun 17, 2012 at 7:11 PM

C++

Is it possible to call a constructor with parameters for a struct within another struct? (Something like this, though VC++ is highlighting the "2" in myA and saying it wants a type specifier, so this is obviously wrong).

[source lang="cpp"]struct A{
int iSize;
A(int x = 10) { iSize = x; }
}; // A

struct B{
A myA(2);
}; // B[/source]

Essentially I want a struct that has a standardized initial Size member, but I also want to be able to specify a different Size member for it when it is itself a member of other structs.

clb

Jun 17, 2012 at 7:22 PM

Yes, but unfortunately C++ doesn't allow you to conveniently do the initialization like you do on line 7. You'll have to do it in a constructor, like as follows:

[source lang="cpp"]struct A{
int iSize;
A(int x = 10) { iSize = x; }
}; // A

struct B{
A myA;

B()
:myA(2)
{
}
}; // B[/source]

pixelartist

Jun 17, 2012 at 7:36 PM

Perfect, thanks!

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