Example program for dptcon

This example computes the condition number of the symmetric positive definite tridiagonal matrix A  given by
A = 4.0 -2.0 0 0 0 -2.0 10.0 -6.0 0 0 0 -6.0 29.0 15.0 0 0 0 15.0 25.0 8.0 0 0 0 8.0 5.0 .