#include <iostream.h>

class Vector3
{
private:
   double d[3];       
};

class Matrix3x3
{
private:
   double A[3][3];
};


Vector3  operator* ( Matrix3x3 &m, Vector3 & v)          
{
   Vector3 out;
   int i, k;

   for (i = 0; i < 3; i = i + 1)
   {
      out.d[i] = 0.0;

      for (k = 0; k < 3; k = k + 1)
         out.d[i] = out.d[i] +  m.A[i][k] * v.d[k];               
   }

   return(out);
}