Question

c++的问题：error C2676: binary '*' : 'class Point' does not define this operator or a conversion

#include <iostream>
#include <math.h>
using namespace std;
const PI=3.14;
class Point
{
private:
double x,y;
public:
Point(float x=0,float y=0)
{
this->x=x;
this->y=y;
}
~Point()
{
}
float GetX()const
{
return x;
}
float GetY()const
{
return y;
}
void Change(float offX,float offY)
{
x+=offX;y+=offY;
}
};
Area(Point x,Point y)
{
float dist=0;
dist=sqrt(x*x+y*y);
return PI*dist*dist;
};
int main()
{
const Point p1;
Point p2(-5,3);
p1.GetX();
p1.GetY();
cout<<"s1="<<Area(p1,p2)<<endl;
p2.Change(56,34);
cout<<"s2="<<Area(p1,p2)<<endl;
return 0;
}
--------------------Configuration: 1 - Win32 Debug--------------------
Compiling...
1.cpp
C:\Users\Administrator\Desktop\大C软件\1.cpp(34) : error C2676: binary '*' : 'class Point' does not define this operator or a conversion to a type acceptable to the predefined operator
C:\Users\Administrator\Desktop\大C软件\1.cpp(34) : error C2676: binary '*' : 'class Point' does not define this operator or a conversion to a type acceptable to the predefined operator
执行 cl.exe 时出错.

1.obj - 1 error(s), 0 warning(s)

这个地方老是出现各种错误，把*删掉也有错。我c+渣，求大神指导。
最好能够帮我修正一下程序吧- -。。

Answer 1

编译器错误 C2676
　　错误消息:
　　二元“operator”:“type”不定义此运算符或到预定义运算符可接收的类型的转换
　　若要使用该运算符，必须针对指定类型将其重载，或者定义一个到某个类型（该运算符已针对此类型进行了定义）的转换。
更多的编译器错误查询：
http://msdn.microsoft.com/zh-cn/library/sah8k6f4.aspx