#include <iostream.h>


class Matrix3x3
{
public:
   double A[3][3];

};

ostream & operator<<(ostream & cout, Matrix3x3 &m)
{
   int i, j;

   for (i = 0; i < 3; i = i+1)
   {
      for (j = 0; j < 3; j = j+1)
         printf("%5.2lf ", m.A[i][j]);
      cout << endl;
   }

   return cout;
}

int main(int argc, char *argv[])
{
   Matrix3x3 A, B;

   A.A[0][0] = 1.0; A.A[0][1] = 0.0; A.A[0][2] = 0.0;
   A.A[1][0] = 1.0; A.A[1][1] = 1.0; A.A[1][2] = 0.0;
   A.A[2][0] = 1.0; A.A[2][1] = 1.0; A.A[2][2] = 1.0;

   cout << "Initial matrix A:" << endl << A << endl;

   B = A;

   cout << "matrix B = A:" << endl << A << endl;

   B.A[0][0] = 1000;

   cout << endl << "After : B.A[0][0] = 1000" << endl << endl;


   cout << "matrix A:" << endl << A << endl << endl;
   cout << "matrix B:" << endl << B << endl << endl;
}