Program h02bufe

!     H02BUF Example Program Text

!     Mark 27.3 Release. NAG Copyright 2021.

!     .. Use Statements ..
      Use nag_library, Only: e04mff, e04mhf, h02buf, h02bvf, nag_wp, x04acf,   &
                             x04baf
!     .. Implicit None Statement ..
      Implicit None
!     .. Parameters ..
      Real (Kind=nag_wp), Parameter    :: xbl_default = 0.0E0_nag_wp
      Real (Kind=nag_wp), Parameter    :: xbu_default = 1.0E+20_nag_wp
      Integer, Parameter               :: maxm = 50, maxn = 50, nindat = 7,    &
                                          nout = 6
      Integer, Parameter               :: lda = maxm
      Integer, Parameter               :: liwork = 2*maxn + 3
      Integer, Parameter               :: lwork = 2*(maxm+1)**2 + 7*maxn + 5*  &
                                          maxm
      Character (*), Parameter         :: fname = 'h02bufe.opt'
      Character (8), Parameter         :: kblank = '        '
      Character (3), Parameter         :: optim = 'MIN'
!     .. Local Scalars ..
      Real (Kind=nag_wp)               :: objval
      Integer                          :: ifail, infile, iter, m, mode, n
      Logical                          :: mpslst
      Character (8)                    :: nmbnd, nmobj, nmprob, nmrhs, nmrng
      Character (80)                   :: rec
!     .. Local Arrays ..
      Real (Kind=nag_wp)               :: a(maxm,maxn), ax(maxm),              &
                                          bl(maxn+maxm), bu(maxn+maxm),        &
                                          clamda(maxn+maxm), cvec(maxn),       &
                                          work(lwork), x(maxn)
      Integer                          :: intvar(maxn), istate(maxn+maxm),     &
                                          iwork(liwork)
      Character (8)                    :: crname(maxn+maxm)
!     .. Executable Statements ..
      Write (rec,99999) 'H02BUF Example Program Results'
      Call x04baf(nout,rec)

!     Open the data file for reading

      mode = 0

      ifail = 0
      Call x04acf(nindat,fname,mode,ifail)

!     Initialize parameters

      infile = nindat
      nmprob = kblank
      nmobj = kblank
      nmrhs = kblank
      nmrng = kblank
      nmbnd = kblank
      mpslst = .False.

!     Convert the MPSX data file for use by E04MFF

      ifail = 0
      Call h02buf(infile,maxn,maxm,optim,xbl_default,xbu_default,nmobj,nmrhs,  &
        nmrng,nmbnd,mpslst,n,m,a,bl,bu,cvec,x,intvar,crname,nmprob,istate,     &
        ifail)

!     Solve the problem

      Call e04mhf('Print Level = 5')

      ifail = -1
      Call e04mff(n,m,a,lda,bl,bu,cvec,istate,x,iter,objval,ax,clamda,iwork,   &
        liwork,work,lwork,ifail)

      Select Case (ifail)
      Case (0,1,3)

!       Print solution (using MPSX names)

        ifail = 0
        Call h02bvf(n,m,a,lda,bl,bu,x,clamda,istate,crname,ifail)

      End Select

99999 Format (1X,A)
    End Program h02bufe