Program f01abfe
! F01ABF Example Program Text
! Mark 30.2 Release. NAG Copyright 2024.
! .. Use Statements ..
Use nag_library, Only: f01abf, nag_wp, x04caf
! .. Implicit None Statement ..
Implicit None
! .. Parameters ..
Integer, Parameter :: nin = 5, nout = 6
! .. Local Scalars ..
Integer :: i, ifail, lda, ldb, n
! .. Local Arrays ..
Real (Kind=nag_wp), Allocatable :: a(:,:), b(:,:), z(:)
! .. Executable Statements ..
Write (nout,*) 'F01ABF Example Program Results'
Write (nout,*)
Flush (nout)
! Skip heading in data file
Read (nin,*)
Read (nin,*) n
lda = n + 1
ldb = n
Allocate (a(lda,n),b(ldb,n),z(n))
Read (nin,*)(a(i,1:n),i=1,n)
! ifail: behaviour on error exit
! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
ifail = 0
Call f01abf(a,lda,n,b,ldb,z,ifail)
! Print the result matrix B
Call x04caf('L','N',ldb,n,b,ldb,'Lower triangle of inverse',ifail)
End Program f01abfe