面向对象上机实验6(参考代码).doc

实验6-1：写一个程序，定义抽象基类Container，由它派生出三个派生类：Sphere(球体)、Cylinder(圆柱体)、Cube(正方体)。用虚函数分别计算几种图形的表面积和体积。#includeusing namespace std;class Containerprotected:double radius;double height;public:Container(double ra) Container:radius=ra; double print_ra() return radius; double print_he()return height; virtual double surface_area()=0;virtual double volume()=0;class Sphere:public Containerpublic:Sphere(double ra):Container(ra)double surface_area()return 4*3.1416*radius*radius; double volume()return 3.1416*radius*radius*radius*4/3;class Cylinder:public Containerpublic:Cylinder(double ra,double he):Container(ra)height=he; double surface_area()return 2*3.1416*radius*(height+radius); double volume()return 3.1416*radius*radius*height;class Cube:public Containerpublic:Cube(double ra):Container(ra);double surface_area()return radius*radius*6;double volume()return radius*radius*radius;int main()Container *ptr;Sphere obj1(8);Cylinder obj2(3,5);Cube obj3(5);ptr=&obj1;cout球体半径：print_ra()endl;cout球体表面积：surface_area()endl;cout球体体积：volume()endl;ptr=&obj2;cout圆柱体半径：print_ra()endl;cout圆柱体高：print_he()endl;cout圆柱体表面积：surface_area()endl;cout圆柱体体积：volume()endl;ptr=&obj3;cout正方体边长：print_ra()endl;cout正方体表面积：surface_area()endl;cout正方体体积：volume()endl;return 0;实验6-2：定义一个交通工具类Vehicle，然后由该类派生出汽车类Car、卡车类Truck和火车类Train。定义虚函数display显示各个类中的数据成员的信息，其中基类中的display定义为纯虚函数。#includeusing namespace std;class Vehiclepublic: virtual void display()=0;class Train:public Vehiclepublic: Train(int w,int c)wheels=w;compartment=c; void display() coutwheels，compartmentendl;private: int wheels,compartment;class Truck:public Vehiclepublic: Truck(int w)weight=w;void display() coutweightendl;private: int weight;class Car:public Vehiclepublic:Car(int s,int w)seat=s;windows=w; void display()