Program f01ctfe

!     F01CTF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: f01ctf, nag_wp, x04caf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: alpha, beta
      Integer                          :: i, ifail, lda, ldb, ldc, m, n,       &
                                          ncola, ncolb, nrowa, nrowb
      Character (1)                    :: transa, transb
!     .. Local Arrays ..
      Real (Kind=nag_wp), Allocatable  :: a(:,:), b(:,:), c(:,:)
!     .. Intrinsic Procedures ..
      Intrinsic                        :: max
!     .. Executable Statements ..
      Write (nout,*) 'F01CTF Example Program Results'
!     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 f01ctf(transa,transb,m,n,alpha,a,lda,beta,b,ldb,c,ldc,ifail)

!     Print the result matrix C.
      Write (nout,99999) transa, transb, alpha, beta
      Flush (nout)
      Call x04caf('G','X',m,n,c,ldc,'Matrix C:',ifail)
      Write (nout,*)
      Deallocate (a,b,c)
      Go To 100
110   Continue

99999 Format (1X,/,1X,'TRANSA = ''',A,''', TRANSB = ''',A,''', ALPHA = ',1P,   &
        E11.3,', BETA = ',E11.3)
    End Program f01ctfe