请教C＋＋高手

来源：百度知道编辑：UC知道时间：2024/05/15 13:30:22

#include<iostream.h>
class Shape
{public:
Shape(double=0.0,double=0.0);
virtual void setpoint()=0;
protected:
double x,y;
};
Shape::Shape(double a,double b)
{x=a;
y=b;}

class TwoDimShape:public Shape
{public:
TwoDimShape(double=0.0,double=0.0);
void setpoint()
{cout<<"the point of the center is : "<<'('<<x<<","<<y<<')'<<endl;}
virtual void setSide()=0;
};
TwoDimShape::TwoDimShape(double a,double b):Shape(a,b){}

class Circle:public TwoDimShape
{public:
Circle(double=0,double=0.0,double=0.0);
void setSide(double);
void putSide(){cout<<"the Radius of the circle is :"<<Radius<<endl;}
protected:
double Radius;
};
Circle::Circle(double r,double a,double b):TwoDimShape(a,b)
{setSide(r);}
void Circle:

以下程序我在vc++6.0中运行通过
你说的话算数吗？

#include<iostream.h>

class Shape
{
public:
Shape(double=0.0,double=0.0);
virtual void setpoint()=0;
protected:
double x,y;
};

Shape::Shape(double a,double b)
{
x=a;
y=b;
}

class TwoDimShape:public Shape
{
public:

TwoDimShape(double=0.0,double=0.0);
void setpoint()
{
cout<<"the point of the center is : "<<"("<<x<<","<<y<<")"<<endl;
}
// virtual void setSide()=0;这地方不能再次用纯虚函数
};

TwoDimShape::TwoDimShape(double a,double b):Shape(a,b){}

class Circle:public TwoDimShape
{
public:
Circle(double=0,double=0.0,double=0.0);
void setSide(double);
void putSide(){cout<<"the Radius of the circle is :"<<Radius<

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