Program f03bffe ! F03BFF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: dpotrf, f03bff, nag_wp, x04caf ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 Character (1), Parameter :: uplo = 'l' ! .. Local Scalars .. Real (Kind=nag_wp) :: d Integer :: i, id, ifail, info, lda, n ! .. Local Arrays .. Real (Kind=nag_wp), Allocatable :: a(:,:) ! .. Executable Statements .. Write (nout,*) 'F03BFF Example Program Results' ! Skip heading in data file Read (nin,*) Read (nin,*) n lda = n Allocate (a(lda,n)) Read (nin,*)(a(i,1:n),i=1,n) ! Factorize A ! The NAG name equivalent of dpotrf is f07fdf Call dpotrf(uplo,n,a,lda,info) Write (nout,*) Flush (nout) ifail = 0 Call x04caf('L','N',n,n,a,lda,'Array A after factorization',ifail) ifail = 0 Call f03bff(n,a,lda,d,id,ifail) Write (nout,*) Write (nout,99999) d, id Write (nout,*) Write (nout,99998) d*2.0_nag_wp**id 99999 Format (1X,'D = ',F13.5,' ID = ',I12) 99998 Format (1X,'Value of determinant = ',E13.5) End Program f03bffe