Program s22aafe

!     S22AAF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: nag_wp, s22aaf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nlmax = 100, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: x
      Integer                          :: ifail, m, mode, n, nl
!     .. Local Arrays ..
      Real (Kind=nag_wp)               :: p(0:nlmax)
!     .. Executable Statements ..
      Write (nout,*) 'S22AAF Example Program Results'

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

      Read (nin,*) mode, x, m, nl

      Write (nout,*)

      ifail = 0
      Call s22aaf(mode,x,m,nl,p,ifail)

      Write (nout,*) 'MODE      X      M    NL'
      Write (nout,*)
      Write (nout,99999) mode, x, m, nl
      Write (nout,*)

      Select Case (mode)
      Case (1)

        If (m==0) Then
          Write (nout,*) 'Unnormalized Legendre function values'
        Else
          Write (nout,*) 'Unnormalized associated Legendre function values'
        End If

      Case (2)

        If (m==0) Then
          Write (nout,*) 'Normalized Legendre function values'
        Else
          Write (nout,*) 'Normalized associated Legendre function values'
        End If

      End Select

      Write (nout,*) ' n      P(n)'

      Do n = 0, nl
        Write (nout,99998) n, p(n)
      End Do

99999 Format (1X,I3,4X,F5.1,2I6)
99998 Format (1X,I2,1X,1P,E12.4)
    End Program s22aafe