Example program for dgbsv

This example solves the equations
Ax=b ,  
where A  is the band matrix
A = -0.23 2.54 -3.66 0.00 -6.98 2.46 -2.73 -2.13 0.00 2.56 2.46 4.07 0.00 0.00 -4.78 -3.82   and   b = 4.42 27.13 -6.14 10.50 .  
Details of the LU  factorization of A  are also output.