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Diff for /src/usr.bin/units/units.1 between version 1.7 and 1.8

version 1.7, 1998/12/16 02:38:50 version 1.8, 1999/06/05 01:21:45
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 .Op Fl f Ar filename  .Op Fl f Ar filename
 .Op Fl q  .Op Fl q
 .Op Fl v  .Op Fl v
 .Ar from-unit  .Ar from-unit
 .Ar to-unit  .Ar to-unit
 .Sh ARGUMENTS  .Sh ARGUMENTS
 .Bl -tag -width Ds  .Bl -tag -width Ds
 .It Fl f Ar filename  .It Fl f Ar filename
 Specifies the name of the units data file to load.  Specifies the name of the units data file to load.
 .It Fl q  .It Fl q
 Suppresses prompting of the user for units and the display of statistics  Suppresses prompting of the user for units and the display of statistics
 about the number of units loaded.  about the number of units loaded.
 .It Fl v  .It Fl v
 Prints the version number.  Prints the version number.
 .It Ar from-unit Ar to-unit  .It Ar from-unit Ar to-unit
 Allows a single unit conversion to be done directly from the command  Allows a single unit conversion to be done directly from the command
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 only the result of this single conversion.  only the result of this single conversion.
 .El  .El
 .Sh DESCRIPTION  .Sh DESCRIPTION
 The units program converts quantities expression in various scales to  The units program converts quantities expression in various scales to
 their equivalents in other scales.  The units program can only  their equivalents in other scales.  The units program can only
 handle multiplicative scale changes.  It cannot convert Centigrade  handle multiplicative scale changes.  It cannot convert Centigrade
 to Fahrenheit, for example.  It works interactively by prompting  to Fahrenheit, for example.  It works interactively by prompting
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             / 3785.4118              / 3785.4118
 .fi  .fi
 .Pp  .Pp
 Powers of units can be specified using the '^' character as shown in  Powers of units can be specified using the
 the example, or by simple concatenation: 'cm3' is equivalent to 'cm^3'.  .Ql ^
   character as shown in
   the example, or by simple concatenation:
   .Dq cm3
   is equivalent to
   .Dq cm^3 .
 Multiplication of units can be specified by using spaces, a dash or  Multiplication of units can be specified by using spaces, a dash or
 an asterisk.  Division of units is indicated by the slash ('/').  an asterisk.  Division of units is indicated by the slash
 Note that multiplication has a higher precedence than division,  .Pq Ql / .
 so 'm/s/s' is the same as 'm/s^2' or 'm/s s'.  Note that multiplication has a higher precedence than division, so
   .Dq m/s/s
   is the same as
   .Dq m/s^2
   or
   .Dq m/s s .
 If the user enters incompatible unit types, the units program will  If the user enters incompatible unit types, the units program will
 print a message indicating that the units are not conformable and  print a message indicating that the units are not conformable and
 it will display the reduced form for each unit:  it will display the reduced form for each unit:
 .Pp  .Pp
 .nf  .nf
     You have: ergs/hour      You have: ergs/hour
     You want: fathoms kg^2 / day      You want: fathoms kg^2 / day
     conformability error      conformability error
             2.7777778e-11 kg m^2 / sec^3              2.7777778e-11 kg m^2 / sec^3
             2.1166667e-05 kg^2 m / sec              2.1166667e-05 kg^2 m / sec
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 its country name: 'belgiumfranc', 'britainpound'.  When searching for  its country name: 'belgiumfranc', 'britainpound'.  When searching for
 a unit, if the specified string does not appear exactly as a unit  a unit, if the specified string does not appear exactly as a unit
 name, then the units program will try to remove a trailing 's' or  name, then the units program will try to remove a trailing 's' or
 a trailing 'es' and check again for a match.  a trailing 'es' and check again for a match.
 .Pp  .Pp
 All of these definitions can be read in the standard units file, or you  All of these definitions can be read in the standard units file, or you
 can supply your own file.  A unit is specified on a single line by  can supply your own file.  A unit is specified on a single line by
 giving its name and an equivalence.  One should be careful to define  giving its name and an equivalence.  One should be careful to define
 new units in terms of old ones so that a reduction leads to the  new units in terms of old ones so that a reduction leads to the
 primitive units which are marked with '!' characters.  primitive units which are marked with
   .Ql !
   characters.
 The units program will not detect infinite loops that could be caused  The units program will not detect infinite loops that could be caused
 by careless unit definitions.  by careless unit definitions.
 .Pp  .Pp
 Prefixes are defined in the same way as standard units, but with  Prefixes are defined in the same way as standard units, but with
 a trailing dash at the end of the prefix name.  a trailing dash at the end of the prefix name.
 .Sh BUGS  .Sh BUGS
 The effect of including a '/' in a prefix is surprising.  The effect of including a
   .Ql /
   in a prefix is surprising.
 .Pp  .Pp
 Exponents entered by the user can be only one digit.  Exponents entered by the user can be only one digit.
 You can work around this by multiplying several terms.  You can work around this by multiplying several terms.
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 .Pp  .Pp
 The program should use a hash table to store units so that  The program should use a hash table to store units so that
 it doesn't take so long to load the units list and check  it doesn't take so long to load the units list and check
 for duplication.  for duplication.
 .Sh FILES  .Sh FILES
 /usr/share/misc/units.lib - the standard units library  /usr/share/misc/units.lib - the standard units library
 .Sh AUTHOR  .Sh AUTHOR
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