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23 Nov 94

The files ../9_* were copied here, renamed, and other code added
to make a working program that illustrates how to create space
for matrices dynamically and how to free that space.

After space for a matrix has been dynamically allocated, we fill
the matrix with randomly distributed integer values and compute
the trace of the matrix.  Recall that the trace of a matrix A,
written tr(A) or trace(A), is defined to be the sum of the elements
on the main diagonal.  Although other matrix computations are more
interesting, they are also more difficult to code.  Because the
purpose of this program is to illustrate the use of dynamic memory
allocation, it is best to keep things as simple as possible.

To compile this program, give the command

   make