/sys$common/syshlp/helplib.hlb CC, Run-time functions, drand48  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Generate uniformly distributed pseudorandom number sequences.
  Returns 48-bit, nonnegative, double-precision floating-point
  values.

  Syntax:

        #include <stdlib.h>

        double drand48 (void);