类的分解,抽象类与纯虚函数的需要性
为了不模糊概念在这里我们就简单的阐述一下类的分解,前面的教程我们着重讲述了类的继承,继承的特点就是,派生类继承基类的特性,进行//站点:www.cndev-lab.com
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#include <iostream>
using namespace std;
class Vehicle
{
public:
Vehicle(float speed,int total)
{
Vehicle::speed = speed;
Vehicle::total = total;
}
virtual void ShowMember()=0;//纯虚函数的定义
protected:
float speed;
int total;
};
class Car:public Vehicle
{
public:
Car(int aird,float speed,int total):Vehicle(speed,total)
{
Car::aird = aird;
}
virtual void ShowMember()//派生类成员函数重载
{
cout<<speed<<"|"<<total<<"|"<<aird<<endl;
}
protected:
int aird;
};
int main()
{
//Vehicle a(100,4);//错误,抽象类不能创建对象
Car b(250,150,4);
b.ShowMember();
system("pause");
}