! { dg-do run } program main implicit none integer, parameter :: n=5, m=3 character(len=5), dimension(n) :: a character(len=5), dimension(n,m) :: b character(len=5) :: res integer, dimension(n,m) :: v real, dimension(n,m) :: r integer :: i,j logical, dimension(n,m) :: mask character(len=5), dimension(:,:), allocatable :: empty character(len=5) , parameter :: all_zero = achar(0) // achar(0) // achar(0) // achar(0) // achar(0) logical :: smask write (unit=a,fmt='(I5.5)') (21-i*i+6*i,i=1,n) res = maxval(a) if (res /= '00030') STOP 1 res = maxval(a,dim=1) if (res /= '00030') STOP 2 do call random_number(r) v = int(r * 100) if (count (v>20) > 1) exit end do write (unit=b,fmt='(I5.5)') v write (unit=res,fmt='(I5.5)') maxval(v) if (res /= maxval(b)) STOP 3 smask = .true. if (res /= maxval(b, smask)) STOP 4 smask = .false. if (all_zero /= maxval(b, smask)) STOP 5 mask = v > 20 write (unit=res,fmt='(I5.5)') maxval(v,mask) if (res /= maxval(b, mask)) STOP 6 mask = .false. if (maxval(b, mask) /= all_zero) STOP 7 allocate (empty(0:3,0)) res = maxval(empty) if (res /= all_zero) STOP 8 end program main