about no matching function for call to

[Alain Delon]

I am working on an old program. When I use old gcc version to compile the program, it works well, but when I use new gcc version, the program doesn't work. the program is as follows, and the error is "no matching function for call to divide(Vector3D,Vector3D&)".

struct Vector3D {
double x, y, z;
 
Vector3D () {}
Vector3D (double x, double y, double z) { 
this->x = x; this->y = y; this->z = z; 
}
Vector3D (const SmallVector3D& v);
...........
friend Vector3D divide (const Vector3D& p1, const Vector3D& p2) {
return Vector3D (p1.x / p2.x, p1.y / p2.y, p1.z / p2.z);
}
 
class BucketTable3D {
protected:
int _nGrids [ 3 ];
Vector3D _min, _max;
Vector3D _gridWidth;
public:
int* nGrids() { return _nGrids; }
virtual void indicesAt ( const Vector3D& position, int& x, int& y, int& z )
{
 
Vector3D n = ::divide ( position - _min, _gridWidth );
x = (int) n.x; y = (int) n.y; z = (int) n.z;
........
}

struct Vector3D {
double x, y, z;

Vector3D () {}
Vector3D (double x, double y, double z) { 
this->x = x; this->y = y; this->z = z; 
}
Vector3D (const SmallVector3D& v);
...........
friend Vector3D divide (const Vector3D& p1, const Vector3D& p2) {
return Vector3D (p1.x / p2.x, p1.y / p2.y, p1.z / p2.z);
}

class BucketTable3D {
protected:
int _nGrids [ 3 ];
Vector3D _min, _max;
Vector3D _gridWidth;
public:
int* nGrids() { return _nGrids; }
virtual void indicesAt ( const Vector3D& position, int& x, int& y, int& z )
{

Vector3D n = ::divide ( position - _min, _gridWidth );
x = (int) n.x; y = (int) n.y; z = (int) n.z;
........
}

To copy to clipboard, switch view to plain text mode 

Thanks for your kindly help!
Alain