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Код: Выделить всё

class base
{
public:
	int n;
	base(){n=0;}
	virtual ~base(){}
	virtual void AddDate()=0;
	virtual void print()=0;
    virtual void WeightSort(); 
};
class first :p ublic base
{
public:
	first(){naznachenie=NULL; weight=NULL;}
	virtual ~first();
	void AddDate();
	void print()
	{
		for(int i=0;i<n;i++)
		cout<<"naznachenie: "<<naznachenie[i]<<"; weight: "<<weight[i]<<endl;
	}
	void WeightSort(); 
private:
	char **naznachenie;
	int *weight;
};
class second :p ublic base
{
public:
	second(){adress=NULL;}
	virtual ~second();
	 void AddDate();
	void print(){
		for(int i=0;i<n;i++)
			cout<<"name: "<<name[i]<<"; adress:"<<adress[i]<<endl;}
private:
	char **name;
	char **adress;
};

...
...
.... // реализация методов AddDate() для обоих произв. классов

void first::WeightSort()
{
	int b;
	for(int j=1;j<n;j++)
		for(int i=0;i<n-j;i++)
			if(weight[i]>weight[i+1])
			{
				b=weight[i];
				weight[i]=weight[i+1];
				weight[i+1]=b;
			}
			for(int i=0;i<n;i++)
			{
				if(weight[i]<1000) cout<<"(<50)__it`s a letter!"<<endl;
				else cout<<"__it`s a banderol or send"<<endl;
			}
			system("pause");
}

...
...
... // реализация деструкторов

void main()
{
	base *p;
       first fst;
	   second snd;

	   p=&fst;
	   p->AddDate();
	   p->WeightSort();    [B]Error![/B]
                         p->print();
  
	   p = &snd;
	   p->AddDate();
	   p->print();

	   system("PAUSE");
}

Код: Выделить всё

template <class T>
class A
{
private:
	int count;
public:
	A(){ count =0;}
	void add(){ count ++;}
	void del(){ if(--count==NULL) delete this;}
};
template <class T>
class Aptr
{
private:
	T *aptr;
public:
	Aptr(A *p) { aptr=p; p->add();}
	~Aptr(){ aptr->del();}
	T * operator ->() {return aptr;}
};

Код: Выделить всё

class A
{
private:
	int count;
public:
	A(){ count =0;}
	void add(){ count ++;}
	void del(){ if(--count==NULL) delete this;}
};
class Aptr
{
private:
	A *aptr;
public:
	Aptr(A *p) { aptr=p; p->add();}
	~Aptr(){ aptr->del();}
	A * operator ->() {return aptr;}
};


class base
{
public: void fun();
};