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inherit class from structure

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Join Date: Jan 2009

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Reputation: kv123 is an unknown quantity at this point

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kv123

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Newbie Poster

inherit class from structure

Jan 21st, 2009

Hi,

Is this valid in C++??

struct A{...};

class B: public A{...};

Thanks!

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Join Date: Dec 2004

Posts: 2,413

Reputation: Comatose is a jewel in the rough

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Comatose

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Re: inherit class from structure

Jan 21st, 2009

In C++ A Struct IS a Class. The only difference is that in a class, the members by default are private. In a Struct, they are by default public.

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Join Date: Oct 2009

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Reputation: richard bach is an unknown quantity at this point

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richard bach richard bach is offline

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Newbie Poster

Oct 21st, 2009

class base
{ protected:
struct node{};
};
class derived :public base
{
struct node *prev;
};

when i do this i 'm getting an error that prev is not a member of base::node.
what can i do if i want to declare an additional variable
of struct node type in class derived

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Join Date: Oct 2007

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Reputation: YousefAB is an unknown quantity at this point

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YousefAB

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Oct 26th, 2009

richard bach, when I compile exactly what you have, i don't get a problem.
Using Visual Studio 2008. V.9.021022.8

 Help with Code Tags 
 C++ Syntax (Toggle Plain Text) 
#include <iostream>
 
using namespace std;
 
 
class base
{ protected:
struct node{};
};
class derived :public base
{
struct node *prev;
};
 
 
class A
{
   public:
      int a;
};
 
struct B : A { };
 
struct C
{
public:
      int c;
};
 
class D : public C { };
 
int main()
{
   B b;
   D d;
   b.a = 1;
   d.c = 2;
   cout << b.a << " " << d.c << endl;
}
#include <iostream>

using namespace std;


class base
{ protected:
struct node{};
};
class derived :public base
{
struct node *prev;
};


class A
{
   public:
      int a;
};

struct B : A { };

struct C
{
public:
      int c;
};

class D : public C { };

int main()
{
   B b;
   D d;
   b.a = 1;
   d.c = 2;
   cout << b.a << " " << d.c << endl;
}