我一直在阅读C中基于概念的继承.我为所有人附上了一个代码示例.我基本上问这是否正确实现了这个概念？我是新手,所以我只是放下我的想法.欢迎任何评论/批评.
#include "stdafx.h"
#include <memory>
#include <vector>
#include <algorithm>
#include <iostream>
using namespace std;
struct Point{
int x;
int y;
};
class graphics_surface{
class drawable_concept{
public:
virtual void draw(Point const& coordinate) {};
virtual ~drawable_concept() {};
};
template<class T>
class drawable_model : public drawable_concept{
public:
drawable_model(T& item) : item_(item){}
void draw(Point const& coordinate){
item_.draw(coordinate);
}
~drawable_model(){}
private:
T item_;
};
public:
template<class T>
void push_back(T& drawable){
v_.push_back(shared_ptr<drawable_concept>( new drawable_model<T>(drawable)));
}
void draw(Point const& coordinate) {
for_each(v_.begin(),v_.end(),[&](shared_ptr<drawable_concept>& concept){
concept->draw(coordinate);
});
}
private:
vector<shared_ptr<drawable_concept>> v_;
};
struct triangle{
void draw(Point const& p){
cout << "Triangle: " << p.x << "," << p.y << endl;
}
};
struct square{
void draw(Point const& p){
cout << "Sqaure: " << p.x << "," << p.y << endl;
}
};
int _tmain(int argc,_TCHAR* argv[])
{
Point p;
p.x = 1;
p.y = 2;
graphics_surface surface;
surface.push_back(triangle());
surface.draw(p);
return 0;
}
提前致谢.
布莱尔
