inheritance and virtual

最新推荐文章于 2022-02-15 16:28:09 发布

fool_fool

最新推荐文章于 2022-02-15 16:28:09 发布

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分类专栏： C Plus Plus

本文链接：https://blog.youkuaiyun.com/fool_fool/article/details/8872506

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本文通过C++代码示例介绍了基类与派生类的概念，展示了如何使用继承来实现代码复用，并通过多态特性使得派生类能够重写基类的方法，从而实现不同的行为表现。

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#ifndef _INHERIENCE_H_
#define _INHERIENCE_H_
#include <iostream>

using namespace std;

class vehicle{
private:
	char* id;
	double price;
	char* owner;
public:
	vehicle(char* iden = NULL, double pri = -1, char* own = NULL){
		id = iden;
		price = pri;
		owner = own;
	}
	~vehicle(){	}
	char* get_id() const{
		return id;
	}
	virtual double get_price() const{
		cout<<"This is in base!"<<endl;
		return price;
	}
	char* get_owner() const{
		return owner;
	}
};

class bike: public vehicle {
private:
	int a1;
	char* get_id() const{
		return NULL;
	}
public:
	bike(char* iden = NULL, double pri = -1, char* own = NULL, int a = 0) : vehicle(iden, pri, own){
		a1 = a;
	}
	//~bike(){}
	double get_price() const{
		cout<<"This is in bike!"<<endl;
		return 2 * vehicle::get_price();
	}
};

#endif

#include "inherience.h"

int main(){
	char* iden = NULL;
	const vehicle a("skides", 10000, "fool");

	bike b("skides", 10000, "fool", 1);

	const vehicle* vobj = NULL;
	vobj = &a;
	vobj->get_price();
	vobj = &b;
	vobj->get_price();
	return 0;

}