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最新推荐文章于 2023-06-08 11:29:51 发布

原创最新推荐文章于 2023-06-08 11:29:51 发布 · 592 阅读

CC 4.0 BY-SA版权

#include<iostream>
using namespace std;
class area_cl{
protected:
	double height;
	double width;
public:
	area_cl(double r,double s)
	{
		height=r;width=s;
	}
	virtual double area()=0;
};
class rectangle:public area_cl{
public:
	rectangle(double r,double s):area_cl(r,s)
	{};
	double area()
	{
		return height*width;
	}
};
class isosceles:public area_cl{
public:
	isosceles(double r,double s):area_cl(r,s)
	{};
	double area()
	{
		return height*width*0.5;
	}
};
int main()
{;
	area_cl *p;
	rectangle r(10.0,5.0);
	isosceles i(4.0,6.0);
	p=&r;
	cout<<"矩形的面积为:"<<p->area()<<endl;
	p=&i;
	cout<<"三角形的面积为"<<p->area()<<endl;
	system("pause");
	return 0;
}