Example program for zgbbrd

This example reduces the matrix A to upper bidiagonal form, where
A = 0.96-0.81i -0.03+0.96i 0.00+0.00i 0.00+0.00i -0.98+1.98i -1.20+0.19i -0.66+0.42i 0.00+0.00i 0.62-0.46i 1.01+0.02i 0.63-0.17i -1.11+0.60i 0.00+0.00i 0.19-0.54i -0.98-0.36i 0.22-0.20i 0.00+0.00i 0.00+0.00i -0.17-0.46i 1.47+1.59i 0.00+0.00i 0.00+0.00i 0.00+0.00i 0.26+0.26i .