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program format_36
use iso_fortran_env, only: int32, int64, real32, real64
implicit none
real(real32) :: val32
real(real64) :: val64
integer(int64) :: minus_one
integer(int64) :: val64_bits
character(len=8) :: hex32
character(len=16) :: hex64_real
character(len=16) :: hex64_expected
character(len=16) :: hex64_int
val32 = 123.456_real32
val64 = 123.456_real64
minus_one = -1_int64
val64_bits = transfer(val64, val64_bits)
write(hex32, '(Z8.8)') val32
if (trim(hex32) /= '42F6E979') error stop
write(hex64_real, '(Z16.16)') val64
write(hex64_expected, '(Z16.16)') val64_bits
if (trim(hex64_real) /= trim(hex64_expected)) error stop
write(hex64_int, '(Z16.16)') minus_one
if (trim(hex64_int) /= 'FFFFFFFFFFFFFFFF') error stop
end program format_36
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