class in class

[lovelyHanibal]

hi.
I have a problem with that code.

#include <iostream>
using namespace std;

class A{public:
	int i;
	class C{public:
		void ctest()
		{
			cout<<"C test()\n"; 
			cout<<i<<endl;
		};
	} c;
};

int main(){
	A a;
	return 0;
}

the problem is with cout<<i<<endl;
how to use i in class A::C ?
can any one help me please ?

[lovelyHanibal]

sorry for my poor english.

[anilpanicker]

You can do something like this, but remember static member is common to all class instances so please make sure that this is what you want.

#include <iostream>
using namespace std;

class A{
public:
	static int i;
class C{
public:
		void ctest()
		{
			cout<<"C test()\n"; 
			cout<< i<<endl;
		};
	} c;
};

int A::i=0;

int main(){
	A a;
	a.i=1;
	a.c.ctest();
	return 0;
}

[lovelyHanibal]

I have only one object of class A so it will be fine.
Thank You.

[weaknessforcats]

Using static is not a good idea.

All you need to do is have an A* in C and use that pointer to get at the i.

When you create a C object you will need to create an A object that has the i in it.

class A{public:
	int i;
	class C{public:
	    A* obj;
		void ctest()
		{
			cout<<"C test()\n"; 
			cout<<obj->i<<endl;
		};
	} c;
};

int main(){
	A a;
	return 0;
}

[anilpanicker]

That is again a good suggestion for class dependencies ,
Thank you!

[lovelyHanibal]

something like that:

#include <iostream>
using namespace std;

class A
{
	public:
	A():
		c(this),
		i(0)
	{};
	int i;
	class C
	{
		public:
		C(A*a){obj=a;};
		A* obj;
		void ctest()
		{
			cout<<"C test()\n"; 
			cout<< obj->i<<endl;
		};
	};
	C c;
};

int main(){
	A a;
	a.i=1;
	a.c.ctest();
	return 0;
}

if I understand correct.
It work.
Than You.