一、简单工厂
一个工厂类能够根据传入参数而决定创建出哪一种产品类的实例
二、类设计
// 手机
class Phone {
public:
virtual void model() = 0;
};
// 华为手机
class HuaWei : public Phone {
public:
void model() {
cout << "HuaWei" << endl;
}
};
// 小米手机
class XiaoMi : public Phone {
public:
void model() {
cout << "XiaoMi" << endl;
}
};
// 苹果手机
class Apple : public Phone {
public:
void model() {
cout << "Apple" << endl;
}
};
// 生产手机的工厂
class PhoneFactory {
public:
Phone* createPhone(int phone_type) {
switch (phone_type)
{
case 0: m_phone = new HuaWei(); break;
case 1: m_phone = new XiaoMi(); break;
case 2: m_phone = new Apple(); break;
default:
m_phone = nullptr; break;
}
return m_phone;
}
private:
Phone *m_phone;
};
三、使用方式
int main(int argc, char *argv[])
{
Phone *phone = nullptr;
PhoneFactory *factory = new PhoneFactory();
return 0;
}
1、生产产品
int main(int argc, char *argv[])
{
Phone *phone = nullptr;
PhoneFactory *factory = new PhoneFactory();
// 生产华为手机
phone = factory->createPhone(0);
phone->model();
delete phone;
return 0;
}
2、生产产品
int main(int argc, char *argv[])
{
Phone *phone = nullptr;
PhoneFactory *factory = new PhoneFactory();
// 生产小米手机
phone = factory->createPhone(1);
phone->model();
delete phone;
return 0;
}
3、生产产品
int main(int argc, char *argv[])
{
Phone *phone = nullptr;
PhoneFactory *factory = new PhoneFactory();
// 生产苹果手机
phone = factory->createPhone(2);
phone->model();
delete phone;
return 0;
}
四、完整代码
#include <iostream>
using namespace std;
// 手机
class Phone {
public:
virtual void model() = 0;
};
// 华为手机
class HuaWei : public Phone {
public:
void model() {
cout << "HuaWei" << endl;
}
};
// 小米手机
class XiaoMi : public Phone {
public:
void model() {
cout << "XiaoMi" << endl;
}
};
// 苹果手机
class Apple : public Phone {
public:
void model() {
cout << "Apple" << endl;
}
};
// 生产手机的工厂
class PhoneFactory {
public:
Phone* createPhone(int phone_type) {
switch (phone_type)
{
case 0: m_phone = new HuaWei(); break;
case 1: m_phone = new XiaoMi(); break;
case 2: m_phone = new Apple(); break;
default:
m_phone = nullptr; break;
}
return m_phone;
}
private:
Phone *m_phone;
};
int main(int argc, char *argv[])
{
Phone *phone = nullptr;
PhoneFactory *factory = new PhoneFactory();
// 生产华为手机
phone = factory->createPhone(0);
phone->model();
delete phone;
// 生产小米手机
phone = factory->createPhone(1);
phone->model();
delete phone;
// 生产苹果手机
phone = factory->createPhone(2);
phone->model();
delete phone;
return 0;
}
标签:Phone,int,factory,C++,phone,PhoneFactory,简单,model,设计模式
From: https://www.cnblogs.com/lvvou/p/16642356.html