Program g01jcfe

!     G01JCF Example Program Text

!     Mark 28.3 Release. NAG Copyright 2022.

!     .. Use Statements ..
      Use nag_library, Only: g01jcf, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: c, p, pdf, tol
      Integer                          :: i, ifail, lwrk, maxit, n, pn
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: a(:), rlamda(:), wrk(:)
      Integer, Allocatable             :: mult(:)
!     .. Executable Statements ..
      Write (nout,*) 'G01JCF Example Program Results'
      Write (nout,*)

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

!     Display titles
      Write (nout,*) '        A     MULT  RLAMDA'
      Write (nout,*)

!     Use default tolerance
      tol = 0.0E0_nag_wp
      maxit = 500

!     Dummy allocation for the arrays
      Allocate (a(1),rlamda(1),mult(1),wrk(1))

      pn = 0
d_lp: Do
        Read (nin,*,Iostat=ifail) n, c
        If (ifail/=0) Then
          Exit d_lp
        End If

!       Reallocate arrays if required
        If (pn/=n) Then
          Deallocate (a,rlamda,mult,wrk)
          lwrk = n + 2*maxit
          Allocate (a(n),rlamda(n),mult(n),wrk(lwrk))
        End If
        pn = n

!       Read in weights, degrees of freedom and distribution parameter
        Read (nin,*) a(1:n)
        Read (nin,*) mult(1:n)
        Read (nin,*) rlamda(1:n)

!       Calculate probability
        ifail = -1
        Call g01jcf(a,mult,rlamda,n,c,p,pdf,tol,maxit,wrk,ifail)
        If (ifail/=0) Then
          If (ifail<4) Then
            Exit d_lp
          End If
        End If

!       Display results
        Write (nout,99999)(a(i),mult(i),rlamda(i),i=1,n)
        Write (nout,99998) 'C = ', c, '    PROB =', p
      End Do d_lp

99999 Format (1X,F10.2,I6,F9.2)
99998 Format (1X,A,F6.2,A,F7.4)
    End Program g01jcfe