C++primer4——chapter12
2327 ワード
#include<iostream>
#include<vector>
using namespace std;
/*
class Sales_item
{
public:
double avg_price()const;
bool same_isbn(const Sales_item &rhs) const
{ return isbn == rhs.isbn; }
Sales_item(): units_sold(0), revenue(0.0) { }//
private:
string isbn;
unsigned units_sold;
double revenue;
};
double Sales_item::avg_price()const
{
if(units_sold)
return revenue/units_sold;
else
return 0;
}
*/
/*
class Screen
{
public:
typedef std::string::size_type index;
index func(int a.int b);
private:
index heghit,wight;
std::string contents;
std::string::size_type cursor;
//std::string::size_type heghit,wight;
protected:
};
inline Screen::index Screen::func(Screen::index a,Screen::index b)
{
return a+b;
}
*/
/*
class Screen {
public:
// interface member functions
Screen& move(index r, index c);
Screen& set(char);
Screen& set(index, index, char);
Screen& display(iostream &os)
{
do_display(os);
return *this;
}
// other members as before
private:
Screen& do_display(iostream &os)const
{
//do something displsy
os<<"what is the func!!"<<endl;
}
};
*/
/*
int hight;
class aa
{
public:
int diaoyong(int hight)
{
return hight;
}
int diaoyong1(aa::hight)
{
return hight;
}
int diaoyong2(::hight)
{
return hight;
}
private:
int hight,with;
protected:
};
*/
//
/*
class sales_item
{
public:
//sales_item():b(2){}
explicit sales_item(int& c ):b(c){}
explicit sales_item(istream& ist);
void m_cout()
{
cout<<this->b<<endl;
}
private:
int b;
std::string a;
int revenue;
};
sales_item::sales_item(istream& ist)
{
ist>>b;
}
*/
// ，friend
/*
class screen
{
friend class win_con;
public:
protected:
private:
int a;
string b;
char c;
};
class win_con
{
public:
win_con& control(screen &s);
};
win_con& win_con::control(screen &s){
s.a+=1;
return *this;
}
*/
//static
int main()
{
//vector<int> a;
//sales_item my_sales(cin);
//int x=5;
//sales_item my_sales(x);
//my_sales.m_cout();
system("pause");
return 1;
}