Program f01cwfe
! F01CWF Example Program Text
! Mark 29.0 Release. NAG Copyright 2023.
! .. Use Statements ..
Use nag_library, Only: f01cwf, nag_wp, x04daf
! .. Implicit None Statement ..
Implicit None
! .. Parameters ..
Integer, Parameter :: nin = 5, nout = 6
! .. Local Scalars ..
Complex (Kind=nag_wp) :: alpha, beta
Integer :: i, ifail, lda, ldb, ldc, m, n, &
ncola, ncolb, nrowa, nrowb
Character (1) :: transa, transb
! .. Local Arrays ..
Complex (Kind=nag_wp), Allocatable :: a(:,:), b(:,:), c(:,:)
! .. Intrinsic Procedures ..
Intrinsic :: max
! .. Executable Statements ..
Write (nout,*) 'F01CWF Example Program Results'
Write (nout,*)
! Skip heading in data file
Read (nin,*)
100 Continue
! Skip Subexample heading
Read (nin,*,End=110)
Read (nin,*) nrowa, ncola, transa, alpha
Read (nin,*) nrowb, ncolb, transb, beta
lda = max(nrowa,ncola)
ldb = max(nrowb,ncolb)
ldc = lda
Allocate (a(lda,max(nrowa,ncola)),b(ldb,max(nrowb, &
ncolb)),c(ldc,max(nrowa,ncola)))
! Read matrices A and B.
Do i = 1, nrowa
Read (nin,*) a(i,1:ncola)
End Do
Do i = 1, nrowb
Read (nin,*) b(i,1:ncolb)
End Do
If (transa=='N' .Or. transa=='n') Then
m = nrowa
n = ncola
Else
m = ncola
n = nrowa
End If
! ifail: behaviour on error exit
! =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
ifail = 0
! Add the two matrices A and B.
Call f01cwf(transa,transb,m,n,alpha,a,lda,beta,b,ldb,c,ldc,ifail)
! Print the result matrix C.
Write (nout,99999) transa, transb
Write (nout,99998) alpha, beta
Flush (nout)
Call x04daf('G','X',m,n,c,ldc,'Matrix C:',ifail)
Write (nout,*)
Deallocate (a,b,c)
Go To 100
110 Continue
99999 Format (1X,'TRANSA = ''',A,''', TRANSB = ''',A,''',')
99998 Format (1X,'ALPHA = (',1P,E11.4,',',E11.4,'), BETA = (',E11.4,',',E11.4, &
')')
End Program f01cwfe