11-3.cpp

为初学者提供的最佳的C++程序设计源程序库

#include<iostream.h>
class figure
{
public:
   double height;
   double width;
};

class square:public figure
{
public:
    square(double h,double w);
   void area();
};

class isosceles_triangle:public figure
{
public:
       isosceles_triangle(double h,double w);
      void area();
};

 square::square(double h,double w)
{
  height=h;
  width=w;
}
 isosceles_triangle:: isosceles_triangle(double h,double w)
{
  height=h;
  width=w;
}

void square::area()
{
 cout<<"the area of square is :"<<width*height<<" \n";
}


void isosceles_triangle::area()
{
 cout<<"the area of isosceles_triangle is :"<<0.5* width*height<<" \n";
}

main()
{
 square s(10.0,6.0);
 isosceles_triangle i(8.0,6.0);
 s.area();
 i.area();
return 0;
}