anchor.diff:              call lab2rgb(l,a,b,red,grn,blu)
               call checkrgb(red,grn,blu,clip)
               call formatrgb(red,grn,blu,rgbstring)
  -            print *,trim(rgbstring)
  +            write(*,*) trim(rgbstring)
           enddo
       elseif (option.eq.'linear') then
           call lch2lab(chroma1,hue1,a1,b1)
  
positive.code:             i = i + 1
              call getarg(i,tag)
              read(tag,*) ncolors
          elseif (tag(1:2).eq.'-v') then
              vrb = 1
          elseif (tag(1:2).eq.'-d') then
  
negative.code:     chroma1 = 40.0
      chroma2 = 40.0
      ncolors = 10
      convert1 = ''
      convert2 = ''
      vrb = 0
      narg = iargc()
      if (narg.eq.0) call usage('')
  