?? memfun1.cpp
字號:
//: C21:MemFun1.cpp
// From Thinking in C++, 2nd Edition
// Available at http://www.BruceEckel.com
// (c) Bruce Eckel 1999
// Copyright notice in Copyright.txt
// Applying pointers to member functions
#include "../purge.h"
#include <algorithm>
#include <vector>
#include <iostream>
#include <functional>
using namespace std;
class Shape {
public:
virtual void draw() = 0;
virtual ~Shape() {}
};
class Circle : public Shape {
public:
virtual void draw() {
cout << "Circle::Draw()" << endl;
}
~Circle() {
cout << "Circle::~Circle()" << endl;
}
};
class Square : public Shape {
public:
virtual void draw() {
cout << "Square::Draw()" << endl;
}
~Square() {
cout << "Square::~Square()" << endl;
}
};
int main() {
vector<Shape*> vs;
vs.push_back(new Circle);
vs.push_back(new Square);
for_each(vs.begin(), vs.end(),
mem_fun(&Shape::draw));
purge(vs);
} ///:~
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