Hi all,
I've 2 classes class A, and class B.
and i want to use list of type B in class A. like this
list<B> typeB ;
till now its fine. But i want to make it a static member. like
static list<B> typeB ;
declaration is not a problem. Definition is the problem. I've 2
constructors for class B
1. default constructor B()
2. B (int a, int b)
how can i define the static member in class A, for both the
constructors.
Thanks in advance,
Surya 5 1535
"Surya Kiran" <sk*@fluent.co.in> wrote in message
news:59**************************@posting.google.c om... Hi all, I've 2 classes class A, and class B. and i want to use list of type B in class A. like this
list<B> typeB ;
till now its fine. But i want to make it a static member. like
static list<B> typeB ;
declaration is not a problem. Definition is the problem. I've 2 constructors for class B 1. default constructor B() 2. B (int a, int b)
how can i define the static member in class A, for both the constructors.
How about posting the code and the error you get ?
Surya Kiran wrote: how can i define the static member in class A, for both the constructors.
Static members are only constructed once, so as you don't get to
construct it multiple times, therefor choose the B ctor that is most
relevant. Most probably the default one.
"Surya Kiran" <sk*@fluent.co.in> skrev i en meddelelse
news:59**************************@posting.google.c om... Hi all, I've 2 classes class A, and class B. and i want to use list of type B in class A. like this
list<B> typeB ;
This name is confusing - it is not a type. till now its fine. But i want to make it a static member. like
static list<B> typeB ;
declaration is not a problem. Definition is the problem. I've 2 constructors for class B 1. default constructor B() 2. B (int a, int b)
how can i define the static member in class A, for both the constructors.
Thanks in advance, Surya
Well... a static member - if this is what you want - is not declared in a
constructor. This is what you want:
// header
#include <list>
class B {};
class A
{
static std::list<B> list_of_b;
};
// source
std::list<B> A::list_of_b;
Kind regards
Peter
My question is how do we initialize a pointer to static member.
if its a ordinary class (class MyClass) we can initialize it to NULL,
but my question is
//someclass.hpp
class someclass
{
....
static list<MyClass> *mylist ; //declaring is over.
....
};
//Lets assume i'm initialize it in someclass.cpp
//how do i initialize it.
//obviously not like this
// list<MyClass>* someclass::mylist = 0;
Please clarify.
Thanks in advance,
Surya
"Peter Koch Larsen" <pk*****@mailme.dk> wrote in message news:<RG*********************@news000.worldonline. dk>... "Surya Kiran" <sk*@fluent.co.in> skrev i en meddelelse news:59**************************@posting.google.c om... Hi all, I've 2 classes class A, and class B. and i want to use list of type B in class A. like this
list<B> typeB ;
This name is confusing - it is not a type. till now its fine. But i want to make it a static member. like
static list<B> typeB ;
declaration is not a problem. Definition is the problem. I've 2 constructors for class B 1. default constructor B() 2. B (int a, int b)
how can i define the static member in class A, for both the constructors.
Thanks in advance, Surya
Well... a static member - if this is what you want - is not declared in a constructor. This is what you want:
// header #include <list> class B {};
class A { static std::list<B> list_of_b; };
// source std::list<B> A::list_of_b;
Kind regards Peter
"Surya Kiran" <sk*@fluent.co.in> wrote... My question is how do we initialize a pointer to static member.
And your example shows a static member that is a pointer, not a pointer
to static member. Do you actually know what you want? if its a ordinary class (class MyClass) we can initialize it to NULL,
You can initialise any pointer to 0, regardless what it points to.
but my question is
//someclass.hpp class someclass { ... static list<MyClass> *mylist ; //declaring is over. ... };
//Lets assume i'm initialize it in someclass.cpp //how do i initialize it. //obviously not like this // list<MyClass>* someclass::mylist = 0;
Yes, that's the way, if you want to be explicit. Static data are
initialised to 0 anyway, even if you don't provide an initialiser. Please clarify. Thanks in advance, Surya "Peter Koch Larsen" <pk*****@mailme.dk> wrote in message
news:<RG*********************@news000.worldonline. dk>... "Surya Kiran" <sk*@fluent.co.in> skrev i en meddelelse news:59**************************@posting.google.c om... Hi all, I've 2 classes class A, and class B. and i want to use list of type B in class A. like this
list<B> typeB ;
This name is confusing - it is not a type. till now its fine. But i want to make it a static member. like
static list<B> typeB ;
declaration is not a problem. Definition is the problem. I've 2 constructors for class B 1. default constructor B() 2. B (int a, int b)
how can i define the static member in class A, for both the constructors.
Thanks in advance, Surya
Well... a static member - if this is what you want - is not declared in
a constructor. This is what you want:
// header #include <list> class B {};
class A { static std::list<B> list_of_b; };
// source std::list<B> A::list_of_b;
Kind regards Peter This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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