DYNAMIC_ARRAY_2D:
  C version
  Demonstrate the allocation and use of dynamic arrays.

  A = a dynamically allocated matrix:

   0   1   2   3   4
  10  11  12  13  14
  20  21  22  23  24
  30  31  32  33  34

  B = A' * A
  (also dynamically allocated)

  1400  1460  1520  1580  1640
  1460  1524  1588  1652  1716
  1520  1588  1656  1724  1792
  1580  1652  1724  1796  1868
  1640  1716  1792  1868  1944

DYNAMIC_ARRAY_2D:
  Normal end of execution.