一个代码的错误求改正！

2008-06-16 04:07:35 115 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Unity的SendMessage用法简述，以及SendMessage has no receiver!错误改正我在学习Unity项目开发的时候，用到的SendMessage往往会出现以下错误。就是：SendMessage has no receiver! **首先我们先明白错误的发生原因：**顾名思义是所发送的消息没有接收者，类比为假设你所定义的某个物体A，但A触发某个事件时，需要调用到物体B中所拥有的方法，你需要先找到B，然后再去SendMessage，如下：这里是会报错的例子。 if(collis... 阅读详情

#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？？？？？？？？？？

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