Program f07asfe ! F07ASF Example Program Text ! Mark 24 Release. NAG Copyright 2012. ! .. Use Statements .. Use nag_library, Only: nag_wp, x04dbf, zgetrf, zgetrs ! .. Implicit None Statement .. Implicit None ! .. Parameters .. Integer, Parameter :: nin = 5, nout = 6 Character (1), Parameter :: trans = 'N' ! .. Local Scalars .. Integer :: i, ifail, info, lda, ldb, n, nrhs ! .. Local Arrays .. Complex (Kind=nag_wp), Allocatable :: a(:,:), b(:,:) Integer, Allocatable :: ipiv(:) Character (1) :: clabs(1), rlabs(1) ! .. Executable Statements .. Write (nout,*) 'F07ASF Example Program Results' ! Skip heading in data file Read (nin,*) Read (nin,*) n, nrhs lda = n ldb = n Allocate (a(lda,n),b(ldb,nrhs),ipiv(n)) ! Read A and B from data file Read (nin,*)(a(i,1:n),i=1,n) Read (nin,*)(b(i,1:nrhs),i=1,n) ! Factorize A ! The NAG name equivalent of zgetrf is f07arf Call zgetrf(n,n,a,lda,ipiv,info) Write (nout,*) Flush (nout) If (info==0) Then ! Compute solution ! The NAG name equivalent of zgetrs is f07asf Call zgetrs(trans,n,nrhs,a,lda,ipiv,b,ldb,info) ! Print solution ! ifail: behaviour on error exit ! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft ifail = 0 Call x04dbf('General',' ',n,nrhs,b,ldb,'Bracketed','F7.4', & 'Solution(s)','Integer',rlabs,'Integer',clabs,80,0,ifail) Else Write (nout,*) 'The factor U is singular' End If End Program f07asfe