11-7.cpp

为初学者提供的最佳的C++程序设计源程序库

#include<iostream.h>
class Circle
{
   float radius;
 public:
   Circle(float r) 
   {
     radius=r;
     cout<<"Circle Initialized!"<<endl;
    }
   ~Circle()
   {cout<<"Circle Destroyed!"<<endl;}
   double Area()
   {return 3.14159*radius*radius;}
};
class Table
{
   float height;
 public:
   Table(float h)
   {
     height=h;
     cout<<"Table Initialized!"<<endl;
    }
   ~Table()
   {cout<<"Table Destroyed!"<<endl;}
   float Height()
   {return height;}
};
class RoundTable:public Circle,public Table
{
  int color;
public:
   RoundTable(float r,float h,int c);
   int Color()
   {return color;}
   ~RoundTable()
   {cout<<"RoundTable Destroyed!"<<endl;}
};
RoundTable::RoundTable(float r,float h,int c)
      :Circle(r),Table(h)
{
   color=c;
   cout<<"RoundTable Initialized!"<<endl;
}
main()
{
   RoundTable cir_table(10.0,1.5,4);
   cout<<"The cir_table(10.0,1.5,4)properties are:"<<endl;
   cout<<"Area="<<cir_table.Area()<<endl;
   cout<<"Height="<<cir_table.Height()<<endl;
   cout<<"Color="<<cir_table.Color()<<endl;
}