random_3.f90

来自「用于进行gcc测试」· F90 代码 · 共 30 行

! { dg-do run }
! { dg-require-effective-target fortran_large_real }
! Check that the random_seed for real(10) or real(16) exists and that
! real(8) and real(10) or real(16) random number generators
! return the same sequence of values.
! Mostly copied from random_2.f90
program random_4
  integer,parameter :: k = selected_real_kind (precision (0.0_8) + 1)

  integer, dimension(:), allocatable :: seed
  real(kind=8), dimension(10) :: r8
  real(kind=k), dimension(10) :: r10
  real, parameter :: delta = 1.d-10
  integer n

  call random_seed (size=n)
  allocate (seed(n))
  call random_seed (get=seed)
  ! Test both array valued and scalar routines.
  call random_number(r8)
  call random_number (r8(10))

  ! Reset the seed and get the real(8) values.
  call random_seed (put=seed)
  call random_number(r10)
  call random_number (r10(10))

  if (any ((r8 - r10) .gt. delta)) call abort
end program random_4