GNU Octave  4.2.1
A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
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r1mach.f
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1  real function r1mach (i)
2  integer i
3  logical init
4  real rmach(5)
5  real slamch
6  external slamch
7  save init, rmach
8  data init /.false./
9  if (.not. init) then
10  rmach(1) = slamch('u')
11  rmach(2) = slamch('o')
12  rmach(3) = slamch('e')
13  rmach(4) = slamch('p')
14  rmach(5) = log10(slamch('b'))
15  init = .true.
16  endif
17  if (i .lt. 1 .or. i .gt. 5) goto 999
18  r1mach = rmach(i)
19  return
20  999 write (*, 1999) i
21  1999 format (' r1mach - i out of bounds', i10)
22  call xstopx(' ')
23  r1mach = 0
24  end
octave_value log10(void) const
Definition: ov.h:1380
is false
Definition: cellfun.cc:398