#include <iostream.h>


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

   void addScalar(double x)
   {
      int i, j;

      for (i = 0; i < 3; i = i+1)
         for (j = 0; j < 3; j = j+1)
	     A[i][j] = A[i][j] + x;
   }


   void addMatrix(Matrix3x3 x)
   {
      int i, j;

      for (i = 0; i < 3; i = i+1)
         for (j = 0; j < 3; j = j+1)
	     A[i][j] = A[i][j] + x.A[i][j];
   }

   void print()
   {
      int i, j;

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


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

   B.A[0][0] = 1.0; B.A[0][1] = 2.0; B.A[0][2] = 3.0;
   B.A[1][0] = 4.0; B.A[1][1] = 5.0; B.A[1][2] = 6.0;
   B.A[2][0] = 7.0; B.A[2][1] = 8.0; B.A[2][2] = 9.0;
   
   cout << "Initial matrix:" << endl << endl;
   B.print();

   B.addScalar(40);
   cout << endl << "After B.addScalar(40):" << endl << endl;
   B.print();

   C.A[0][0] = -1.0; C.A[0][1] = -2.0; C.A[0][2] = -3.0;
   C.A[1][0] = -4.0; C.A[1][1] = -5.0; C.A[1][2] = -6.0;
   C.A[2][0] = -7.0; C.A[2][1] = -8.0; C.A[2][2] = -9.0;

   B.addMatrix(C);
   cout << endl << "After B.addMatrix(C):" << endl << endl;
   B.print();
}