zshch.f

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      SUBROUTINE zshch(ZR, ZI, CSHR, CSHI, CCHR, CCHI)
C***BEGIN PROLOGUE  ZSHCH
C***REFER TO  ZBESK,ZBESH
C
C     ZSHCH COMPUTES THE COMPLEX HYPERBOLIC FUNCTIONS CSH=SINH(X+I*Y)
C     AND CCH=COSH(X+I*Y), WHERE I**2=-1.
C
C***ROUTINES CALLED  (NONE)
C***END PROLOGUE  ZSHCH
C
      DOUBLE PRECISION CCHI, CCHR, CH, CN, CSHI, CSHR, SH, SN, ZI, ZR,
     * dcosh, dsinh
      sh = dsinh(zr)
      ch = dcosh(zr)
      sn = dsin(zi)
      cn = dcos(zi)
      cshr = sh*cn
      cshi = ch*sn
      cchr = ch*cn
      cchi = sh*sn
      RETURN
      END