#include<iostream>

using namespace std;

class Shape

{

public:

void CreateShape();

};

void Shape::CreateShape()

{

cout<<"建立一個圖形"<<endl;

}

class Rectangle:virtual public Shape

{

public:

Rectangle(float a,float b);

float getArea();

private:

float m_fLength;

float m_fWidth;

float m_fArea;

};

Rectangle::Rectangle (float a,float b)

{

m_fLength=a;

m_fWidth=b;

cout<<"The Length of Rectangle is "<<m_fLength;

cout<<"The Width of Rectangle is "<<m_fWidth;

}

float Rectangle::getArea()

{

m_fArea=m_fLength*m_fWidth;

return m_fArea;

}

class Circle:virtual public Shape

{

public:

Circle(float r);

float getArea();

private:

float m_fRadius;

float m_fArea;

};

Circle::Circle(float r)

{

m_fRadius=r;

cout<<"The Radius of Circle is "<<m_fRadius;

}

float Circle::getArea()

{

m_fArea=3.1415*m_fRadius*m_fRadius;

return m_fArea;

}

int main()

{

Rectangle R1(3.0,2.0);

R1.CreateShape();

cout<<"The area of this rectangle is:"<<R1.getArea()<<endl;

Circle C1(3.0);

cout<<"The area of this circle is:"<<C1.getArea()<<endl;

return 0;

}