Re: STL map problem

Hello,

I have following code. I wrote it in Borland C++ Builder 5.0.

#include <map>
#include <iostream>

using namespace std;

struct TVec
 {
   double x, y, z;
   bool operator !=(const TVec& v2) const
   { return ((fabs(x-v2.x)>1e-12) || (fabs(y-v2.y)>1e-12) ||
(fabs(z-v2.z)>1e-12));}
 };

typedef map<TVec, int, not_equal_to<TVec> > TMap;

int main()
{
 TMap m;
 TMap::iterator iter;

 TVec v;

 v.x=3.1; v.y=2.3; v.z=4.1;
 m[v] = 32;
 v.x=-3.1; v.y=2.3; v.z=4.1;
 m[v]=45;
 v.x=-3.25; v.y=2.3; v.z=4.1;
 m[v] = 55;

 cout<<"size = "<<m.size()<<endl;

 v.x=3.1; v.y=2.3; v.z=4.1;
 iter = m.find(v);
 if (iter != m.end())
  cout<<iter->second<<endl;

 v.x=-3.1; v.y=2.3; v.z=4.1;
 iter = m.find(v);
 if (iter != m.end())
  cout<<iter->second<<endl;

 v.x=-3.25; v.y=2.3; v.z=4.1;
 iter = m.find(v);
 if (iter != m.end())
  cout<<iter->second<<endl;

 system("pause");
 return 0;

}

After compilation we have on the screen :
size=3
32
45

However third element exsists in the map it isn't found by m.find(TVec)
(!!!)
I would be grateful for any suggestions.
Best regards, arkandor