From this day onwards,I will start to learn C++ Design pattern.& I will write down my comprehensions and feelings.(for the purpose of self-examination,and communicating with newbies as me.)
(Adapterd from lxgljj's article in JAVA.)
#include <iostream>
#include <string>
using namespace std;
class PostedBook
{
public:
PostedBook( const string& rhs)
{
this->m_StringNO_ = rhs;
}
PostedBook( const PostedBook& rhs )
{
this->m_StringNO_ = rhs.m_StringNO_;
}
const PostedBook& operator=( const PostedBook& rhs )
{
this->m_StringNO_ = rhs.m_StringNO_;
return *this;
}
string GetPhoneNoFromBook()
{
return ( m_StringNO_ );
}
private:
string m_StringNO_;
};
class TellFriend
{
public:
void TellSth()
{
cout<<"Azure's phone number: ";
}
};
class TellFriendPhoneNo:public TellFriend
{
public:
TellFriendPhoneNo( const PostedBook& pb ):m_PostedBook_(pb)
{
//Nothing needed to be done.
}
void TellPhoneNumber()
{
cout<<m_PostedBook_.GetPhoneNoFromBook()<<endl;
}
private:
PostedBook m_PostedBook_;
};
int main()
{
PostedBook pb("13973284801");
TellFriendPhoneNo gp(pb);
gp.TellSth();
gp.TellPhoneNumber();
return (1);
} 
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