一个代码的错误求改正！

[wangsiyuanoo]

#include <iostream>
using namespace std;
//////////形状类/////////////////////
class CShape
{
public:
virtual double GetArea() = 0;
};
//////////////圆类///////////////////////
const double g_Pi = 3.1415926;
class CCircle : public CShape
{
CCircle()
{

}

CCircle(double r) : m_dRadius(r)
{

}

~CCircle()
{

}

void SetRadius(double r)
{
m_dRadius = r;
}
public:
virtual double GetArea()
{
return m_dRadius* m_dRadius * g_Pi;
}

protected:
double m_dRadius; //半径
};
//////////////长方形类//////////////////////
class CRect:public CShape
{
CRect()
{


}
CRect(double a,double b)
{


}
~CRect()
{


}
void SetLength (double a,double b)
{
m_dLength1 = a;
m_dLength2 = b;

}

public:
virtual double GetArea()
{
return m_dLength1 * m_dLength2;

}
protected:
double m_dLength1; //边长
double m_dLength2;

};

/////////主函数////////////////////////
void main()
{
CShape* pCircle = new CCircle(5);
pCircle->GetArea();
delete pCircle;


CRect box(10,5);
box.GetArea();
}

编译时出现这个错误：error C2248: 'CCircle::CCircle' : cannot access private member declared in class 'CCircle'
error C2248: 'CRect::CRect' : cannot access private member declared in class 'CRect'
error C2248: 'CRect::~CRect' : cannot access private member declared in class 'CRec
怎么改正错误啊？？？？？？？？？？

[ckt]

编译器不是告诉你了么

[jhs1982419]

看起来有点乱

[hai040]

[Quote=引用 1 楼 ckt1120 的回复:]
编译器不是告诉你了么
[/Quote]
class
{
public:
protected:
private:
}
缺省是private

[coverallwangp]

#include <iostream> 
using namespace std; 
//////////形状类///////////////////// 
class CShape 
{ 
public: 
virtual double GetArea() = 0; 
}; 
//////////////圆类/////////////////////// 
const double g_Pi = 3.1415926; 
class CCircle : public CShape 
{ 
public:
CCircle() 
{ 

} 

CCircle(double r):m_dRadius(r) 
{ 
        
} 

~CCircle() 
{ 

} 

void SetRadius(double r) 
{ 
m_dRadius = r; 
} 
public: 
virtual double GetArea() 
{ 
return m_dRadius* m_dRadius * g_Pi; 
} 

protected: 
double m_dRadius; //半径 
}; 
//////////////长方形类////////////////////// 
class CRect:public CShape 
{
	
public:
CRect() 
{ 


} 
CRect(double a,double b) 
{ 


} 
~CRect() 
{ 


} 
void SetLength (double a,double b) 
{ 
m_dLength1 = a; 
m_dLength2 = b; 

} 

public: 
virtual double GetArea() 
{ 
return m_dLength1 * m_dLength2; 

} 
protected: 
double m_dLength1;          //边长 
double m_dLength2; 

}; 

/////////主函数//////////////////////// 
void main() 
{ 
CCircle* pCircle = new CCircle(5); 
pCircle->GetArea(); 
delete pCircle; 


CRect box(10,5); 
box.GetArea(); 
} 

[simo110]

建议楼主仔细看编译器给的错误信息
这是必须的