     INTEGER
          The leading dimension of array A.  LDA &gt;= MAX(1,N).

  B       (input/output) DOUBLE PRECISION array, dimension (LDB,M)
          On entry, the leading N-by-M part of this array must
          contain the input matrix B.
          On exit, the contents of B are destroyed: all elements but
          those in the first row are set to zero.

  LDB     INTEGER
          The leading dimension of array B.  LDB &gt;= MAX(1,N).

  C       (input/output) DOUBLE PRECISION array, dimension (L