C++ 工厂方法模式的实现

作笔记使用，如有写的不好或者不够精妙的，还请指正！！如果觉得有帮助也可以三连一波，多谢！

代码： 

#include
using namespace std;


class Caculator {
public:
	virtual int caculate(int a, int b) = 0; // 设为纯虚函数，子类必须重写
};

class Add : public Caculator {
public:
	int caculate(int a, int b) {
		return a + b;
	}
};

class Minus : public Caculator {
public:
	int caculate(int a, int b) {
		return a - b;
	}
};

class Multiply : public Caculator {
public:
	int caculate(int a, int b) {
		return a * b;
	}
};

class Divide : public Caculator {
public:
	int caculate(int a, int b) {
		return a / b;
	}
};

class Factory {
public:
	virtual Factory* create_factory() = 0;
};

class AddFactory {
public:
	Caculator* create_factory() {
		return new Add();
	}
};

class MinusFactory {
public:
	Caculator* create_factory() {
		return new Minus();
	}
};

class MultiplyFactory {
public:
	Caculator* create_factory() {
		return new Multiply();
	}
};

class DivideFactory {
public:
	Caculator* create_factory() {
		return new Divide();
	}
};

int main() {
	AddFactory addFactory;
	Caculator* add = addFactory.create_factory();
	cout << add->caculate(1,3) << endl;
	delete add;
	return 0;
}

 溜了溜了~~~