?? stlshape.cpp
字號:
//: C20:Stlshape.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Simple shapes w/ STL
#include <vector>
#include <iostream>
using namespace std;
class Shape {
public:
virtual void draw() = 0;
virtual ~Shape() {};
};
class Circle : public Shape {
public:
void draw() { cout << "Circle::draw\n"; }
~Circle() { cout << "~Circle\n"; }
};
class Triangle : public Shape {
public:
void draw() { cout << "Triangle::draw\n"; }
~Triangle() { cout << "~Triangle\n"; }
};
class Square : public Shape {
public:
void draw() { cout << "Square::draw\n"; }
~Square() { cout << "~Square\n"; }
};
typedef std::vector<Shape*> Container;
typedef Container::iterator Iter;
int main() {
Container shapes;
shapes.push_back(new Circle);
shapes.push_back(new Square);
shapes.push_back(new Triangle);
for(Iter i = shapes.begin();
i != shapes.end(); i++)
(*i)->draw();
// ... Sometime later:
for(Iter j = shapes.begin();
j != shapes.end(); j++)
delete *j;
} ///:~
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