6.13

#include<iostream>using namespace std;class Base{double h;public:Base(double a){h=a;}virtual void disp()=0;double Getterh(){return h;}};class Cuboid:public Base{double chuang;double kuang;public:Cuboid(double a,double b,double c):Base(a){chuang=b;kuang=c;}void disp(){cout<<"高为:"<<Getterh()<<"  "<<"长为"<<chuang<<"  "<<"宽为"<<kuang<<" "<<"的长方体体积:"<<chuang*kuang*Getterh()<<endl;}};class Cylinder:public Base{double r;public:Cylinder(double a,double b):Base(a){r=b;}void disp(){cout<<"底面半径为"<<r<<"  "<<"高为"<<Getterh()<<"   "<<"的圆柱体体积为:"<<3.14*r*r*Getterh()<<endl;}};int main(){Base* p;Cuboid a(10.0,5.0,6.0);Cylinder b(5.0,1.0);     p=&a; p->disp();     p=&b;  p->disp();  return 0;}

<img src="http://img.blog.csdn.net/20150502200710075?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvaHVhbmdjaG9uZ3dlbg==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" align="bottom" alt="" />