#include <iostream>
#include <string>
using namespace std;
1.实现以下几个类的成员函数
2.实现一个虚函数的覆盖及调用
3.处理菱形继承问题。
植物
class Botany
{
public:
//(const string& name) // const char* name
Botany(const char* name = "")
:_name(name) //构造函数
{
//cout<<"Botany(const char* name)"<<endl;
}
Botany(const Botany& b)
:_name(b._name)
{}
Botany& operator= (const Botany& b)
{
if (this != &b)
{
_name = b._name;
}
return *this;
}
~Botany()
{}
virtual void Display ()
{
cout<<"Botany::Display"<<endl;
}
public:
protected:
string _name; //名字
};
class Tree : virtual public Botany
{
public:
Tree(const string& name, int hight)
:Botany(name.c_str())
,_hight(hight)
{}
Tree(const Tree& t)
:Botany(t)
,_hight(t._hight)
{}
Tree& operator=(const Tree& t)
{
if (this != &t)
{
Botany::operator=(t);
_hight = t._hight;
}
return *this;
}
~Tree()
{}
virtual void Display ()
{
cout<<"Tree::Display"<<endl;
}
public:
int _hight; // 高度
};
class Flower : virtual public Botany
{
public:
Flower(const string& name, int colour)
:Botany(name.c_str())
,_colour(colour)
{}
Flower(const Flower& t)
:Botany(t)
,_colour(t._colour)
{}
Flower& operator=(const Flower& t)
{
if (this != &t)
{
Botany::operator=(t);
_colour = t._colour;
}
return *this;
}
~Flower()
{}
public:
protected:
int _colour; // 颜色
};
白兰花，即是树有时花。
class MicheliaAlba : public Tree, public Flower
{
public:
// 必须先初始化虚基类的构造函数
MicheliaAlba(const string& name, int hight, int colour)
:Botany(name.c_str())
,Flower(name, colour)
,Tree(name, hight)
{}
MicheliaAlba(const MicheliaAlba& m)
:Botany(m._name.c_str())
,Flower(m)
,Tree(m)
{}
MicheliaAlba& operator=(const MicheliaAlba& m)
{
if (this != &m)
{
Flower::operator=(m);
Tree::operator=(m);
}
return *this;
}
~MicheliaAlba()
{}
void Display()
{
//cout<<_name<<endl;
cout<<Flower::_name<<endl;
cout<<Tree::_name<<endl;
}
protected:
};
void Test()
{
Botany b1("xxx");
Tree t1("xxx", 1);
Botany& r1 = b1;
r1.Display();
Botany& r2 = t1;
r2.Display();
Botany* p3 = &t1;
p3->Display();
}
int main()
{
//Test();
MicheliaAlba m1("白玉兰", 10, 1);
MicheliaAlba m2("黄玉兰", 15, 2);
cout<<&(m1.Flower::_name)<<endl;
cout<<&(m1.Tree::_name)<<endl;
m1.Display();
return 0;
}
处理菱形继承问题&&实现一个虚函数的覆盖及调用&&实现以下几个类的成员函数