第六章

最新推荐文章于 2024-08-06 21:59:48 发布

原创最新推荐文章于 2024-08-06 21:59:48 发布 · 305 阅读

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【6.13】定义基类base，其数据成员为高h，定义成员函数disp

#include<iostream>    
using namespace std;
class Base{
public:
   
    Base(double h1)
	{ h=h1;}
virtual void disp()       
{ cout<<"长方体和圆柱体的高度都是："<<h<<endl;  
}     
  protected:
    double h;               
};
class Cu:public Base{   
  public:
    Cu(double l,double w,double h):Base(h)
	{ len=l, wid=w;
	}
  void disp()             
	 
   {
    cout<<"  长方体的体积="<<len*wid*h<<endl;
    }
    private:
    double len,wid;           
};
class C:public Base { 
  public:
    C(double r1,double h1):Base(h1)
	{ r=r1;}
    void disp()               
    {
   
    cout<<"  圆柱体的体积="<<r*r*3.14*h<<endl;
    }
private:
    double r;                 
};
int main()
{ Base *pc;
  Cu cu1(1,2,3);
  C  c1(1,2);
  pc=&cu1;
  pc->disp();
  pc=&c1;
  pc->disp();
 system("pause");  
return 0;