vc0903.cpp

VC例题源代码,书本上的。。几乎是通用的

// Example 9.3: 抽象宠物类
#include  <iostream.h> 
#include  <string.h>
class Pet 							//基类
{
	char 	m_strName[20];
	int		m_nAge;
	char 	m_strColor[12];
public:
	char 	m_strType[10];
	Pet(char *,int ,char *);
	char* GetName()	{ return m_strName; }
	int	 GetAge()	{ return m_nAge;  }
	char* GetColor()	{ return m_strColor; }
	virtual void Speak() = 0;  
	virtual void GetInfo()  {}
};
Pet::Pet(char *name,int age,char *color)
{
	strcpy(m_strName,name);
	m_nAge=age;
	strcpy(m_strColor,color);
	strcpy(m_strType,"pet");
}
class Cat : public Pet 				//派生类	
{
public:
	Cat(char *name,int age, char *color):Pet(name,age,color)
	{ 	}
	void Speak() 
	{ cout<<" Sound of speak : miao!miao!"<<endl<<endl; }
	void GetInfo();
}; 
void Cat::GetInfo()
{
	cout<<" The cat's name : "<<GetName()<<endl;
	cout<<" The cat's age  : "<<GetAge() <<endl;
	cout<<" The cat's color: "<<GetColor()<<endl;
}
class Dog : public Pet				//派生类
{
public:
	Dog(char *name,int age, char *color):Pet(name,age,color)
	{  }
	void Speak() 
	{ cout<<" Sound of speak : wang!wang!"<<endl<<endl; }
	void GetInfo();
};
void Dog::GetInfo()
{
	cout<<" The dog's name : "<<GetName()<<endl;
	cout<<" The dog's age  : "<<GetAge() <<endl;
	cout<<" The dog's color: "<<GetColor()<<endl;
}
void main()
{
	Pet	*p1;						//基类对象指针p1
	p1 = new Cat("MiKey",1,"Blue");	//动态生成Cat类对象
	p1->GetInfo();
	p1->Speak();
	delete p1;
	p1 = new Dog("BenBen",2,"Black");//动态生成Dog类对象
	p1->GetInfo();
	p1->Speak();
	delete p1;
}