来自「visualCplusplus学习课件大连东软培训教材」· 代码 · 共 57 行

#include "stdafx.h"

#include <iostream.h>
#include <string.h>

#include <iostream.h>
class CAT
{
public:
	CAT();
	CAT(CAT& cat);
	~CAT();
	int GetAge() const 
	{
		return *itsAge;
	}
	void SetAge(int age)
	{
		*itsAge = age;
	}
protected:
	int *itsAge;
private:
};
CAT::CAT()
{
	itsAge = new int;
	*itsAge = 5;
}

CAT::~CAT()
{
	delete itsAge;
	itsAge = 0;
}

CAT::CAT(CAT& cat)
{
	itsAge = new int;
	*itsAge = *(cat.itsAge);
}
void main()
{
	CAT frisky;
	cout << "frisky's age:" << frisky.GetAge() <<endl;
	cout << "setting frisky to 6...\n";
	frisky.SetAge(6);
	cout << "Creating boots from frisky\n";
	CAT boots(frisky);
	cout << "frisky's age:" << frisky.GetAge() <<endl;
	cout << "boots's age:" << boots.GetAge() <<endl;
	cout << "setting frisky to 7...\n";
	frisky.SetAge(7);
	cout << "frisky's age:" << frisky.GetAge() <<endl;
	cout << "boots's age:" << boots.GetAge() <<endl;
}