COMPLEX FUNCTION CCBRT(Z)
C***BEGIN PROLOGUE  CCBRT
C***DATE WRITTEN   770401   (YYMMDD)
C***REVISION DATE  820801   (YYMMDD)
C***CATEGORY NO.  C2
C***KEYWORDS  COMPLEX,CUBE ROOT,ELEMENTARY FUNCTION
C***AUTHOR  FULLERTON, W., (LANL)
C***PURPOSE  Computes the complex cube root of Z.
C***DESCRIPTION
C
C CCBRT(Z) calculates the complex cube root of Z.  The principal root
C for which -PI .LT. arg(Z) .LE. +PI is returned.
C***REFERENCES  (NONE)
C***ROUTINES CALLED  CARG,CBRT
C***END PROLOGUE  CCBRT