Program g05kkfe

!     G05KKF Example Program Text

!     Mark 27.2 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: g05kff, g05kkf, g05saf, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: lseed = 1, nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: genid, ifail, lstate, n, nv, subid
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: x(:)
      Integer                          :: seed(lseed)
      Integer, Allocatable             :: state(:)
!     .. Executable Statements ..
      Write (nout,*) 'G05KKF Example Program Results'
      Write (nout,*)

!     Skip heading in data file
      Read (nin,*)

!     Read in the base generator information and seed
      Read (nin,*) genid, subid, seed(1)

!     Query G05KFF to get the require length of STATE array
      lstate = 0
      Allocate (state(lstate))
      ifail = 0
      Call g05kff(genid,subid,seed,lseed,state,lstate,ifail)

!     Reallocate STATE
      Deallocate (state)
      Allocate (state(lstate))

!     Initialize the generator to a repeatable sequence
      ifail = 0
      Call g05kff(genid,subid,seed,lseed,state,lstate,ifail)

!     Read in the skip ahead and sample size
      Read (nin,*) n, nv

      Allocate (x(nv))

!     Advance the sequence 2**N places
      ifail = 0
      Call g05kkf(n,state,ifail)

!     Generate a NV variates from a uniform distribution
      ifail = 0
      Call g05saf(nv,state,x,ifail)

!     Display the variates
      Write (nout,99999) x(1:nv)

99999 Format (1X,F10.4)
    End Program g05kkfe