SLATEC Routines --- DCBRT ---

*DECK DCBRT
      DOUBLE PRECISION FUNCTION DCBRT (X)
C***BEGIN PROLOGUE  DCBRT
C***PURPOSE  Compute the cube root.
C***LIBRARY   SLATEC (FNLIB)
C***CATEGORY  C2
C***TYPE      DOUBLE PRECISION (CBRT-S, DCBRT-D, CCBRT-C)
C***KEYWORDS  CUBE ROOT, ELEMENTARY FUNCTIONS, FNLIB, ROOTS
C***AUTHOR  Fullerton, W., (LANL)
C***DESCRIPTION
C
C DCBRT(X) calculates the double precision cube root for
C double precision argument X.
C
C***REFERENCES  (NONE)
C***ROUTINES CALLED  D1MACH, D9PAK, D9UPAK
C***REVISION HISTORY  (YYMMDD)
C   770601  DATE WRITTEN
C   890531  Changed all specific intrinsics to generic.  (WRB)
C   890531  REVISION DATE from Version 3.2
C   891214  Prologue converted to Version 4.0 format.  (BAB)
C***END PROLOGUE  DCBRT