/************************************************************************/

/* 嵌套结构体

 * C++

 **/

/************************************************************************/

struct A

{

private:

	int a1[20];

public:

	void initialize();

	struct B

	{

	private:

		A *b;

		int *p;

	public:

		void initialize(A *a);

		void next();

		int read;

		void set(int i);

	};

	friend A::B;

};

void A::initialize()

{

	memset(a1, 0, sizeof(a1));

}

void A::B::initialize(A *a)

{

	b = a;

	p = a->a1;

}

void A::B::set(int i)

{

	*p = i;

}

/*

void main()

{

	A a;

	A::B b1,b2;

	int i;

	a.initialize();

	b1.initialize(&a);

	b2.initialize(&a);

	for (i =0; i<20; i++)

	{

		b1.set(i);

		b2.set(i);

	}

}

/************************************************************************/

/* C

 * 嵌套结构体

 *

 * */

/************************************************************************/

 typedef struct A

{

	int year;

	int month;

	int day;

};

typedef struct B

{

	string name;

	int age;

	union{

		A aa;

	}xy;

	struct A aa1;

};

void main()

{

	B *b1 =NULL;

	b1->xy.aa.day =1991;

	b1->aa1.month = 7;

	getchar();

}