#03 面向对象设计原则-合成复用原则
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
using namespace std;
//抽象车
class AbstractCar{
public:
virtual void run() = 0;
};
//大众车
class Dazhong :public AbstractCar{
public:
virtual void run(){
cout << "大众车启动..." << endl;
}
};
//拖拉机
class Tuolaji :public AbstractCar{
public:
virtual void run(){
cout << "拖拉机启动..." << endl;
}
};
//针对具体类 不适用继承
#if 0
class Person : public Tuolaji{
public:
void Doufeng(){
run();
}
};
class PersonB : public Dazhong{
public:
void Doufeng(){
run();
}
};
#endif
//可以使用组合
class Person{
public:
void setCar(AbstractCar* car){
this->car = car;
}
void Doufeng(){
this->car->run();
if (this->car != NULL){
delete this->car;
this->car = NULL;
}
}
public:
AbstractCar* car;
};
void test02(){
Person* p = new Person;
p->setCar(new Dazhong);
p->Doufeng();
p->setCar(new Tuolaji);
p->Doufeng();
delete p;
}
//继承和组合 优先使用组合
int main(void){
test02();
return 0;
}
