Program f04atfe

!     F04ATF Example Program Text

!     Mark 27.0 Release. NAG Copyright 2019.

!     .. Use Statements ..
      Use nag_library, Only: f04atf, nag_wp
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Integer                          :: i, ifail, lda, ldaa, n
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: a(:,:), aa(:,:), b(:), c(:),         &
                                          wks1(:), wks2(:)
!     .. Executable Statements ..
      Write (nout,*) 'F04ATF Example Program Results'
      Write (nout,*)
!     Skip heading in data file
      Read (nin,*)
      Read (nin,*) n
      lda = n
      ldaa = n
      Allocate (a(lda,n),aa(ldaa,n),b(n),c(n),wks1(n),wks2(n))
      Read (nin,*)(a(i,1:n),i=1,n), b(1:n)

!     ifail: behaviour on error exit
!             =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
      ifail = 0
      Call f04atf(a,lda,b,n,c,aa,ldaa,wks1,wks2,ifail)

      Write (nout,*) ' Solution'
      Write (nout,99999) c(1:n)

99999 Format (1X,F9.4)
    End Program f04atfe