NAG Library Manual, Mark 28.5
```    Program g01sjfe
!     G01SJF Example Program Text

!     Mark 28.5 Release. NAG Copyright 2022.

!     .. Use Statements ..
Use nag_library, Only: g01sjf, nag_wp
!     .. Implicit None Statement ..
Implicit None
!     .. Parameters ..
Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
Integer                          :: i, ifail, lk, ln, lout, lp
!     .. Local Arrays ..
Real (Kind=nag_wp), Allocatable  :: p(:), peqk(:), pgtk(:), plek(:)
Integer, Allocatable             :: ivalid(:), k(:), n(:)
!     .. Intrinsic Procedures ..
Intrinsic                        :: max, mod, repeat
!     .. Executable Statements ..
Write (nout,*) 'G01SJF Example Program Results'
Write (nout,*)

!     Skip heading in data file

!     Read in the input vectors
Allocate (n(ln))

Allocate (p(lp))

Allocate (k(lk))

!     Allocate memory for output
lout = max(ln,lp,lk)
Allocate (peqk(lout),pgtk(lout),plek(lout),ivalid(lout))

!     Calculate probability
ifail = -1
Call g01sjf(ln,n,lp,p,lk,k,plek,pgtk,peqk,ivalid,ifail)

If (ifail==0 .Or. ifail==1) Then
!       Display titles
Write (nout,*)                                                         &
'    N         P         K       PLEK      PGTK      PEQK    IVALID'
Write (nout,*) repeat('-',68)

!       Display results
Do i = 1, lout
Write (nout,99999) n(mod(i-1,ln)+1), p(mod(i-1,lp)+1),               &
k(mod(i-1,lk)+1), plek(i), pgtk(i), peqk(i), ivalid(i)
End Do
End If

99999 Format (1X,I6,4X,F6.2,4X,I6,3(4X,F6.3),4X,I3)
End Program g01sjfe
```