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Diff for /src/usr.bin/bc/bc.1 between version 1.3 and 1.4

version 1.3, 2003/09/26 07:30:09 version 1.4, 2003/09/26 11:21:26
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 .Dd August 8, 1991  .Dd August 8, 1991
 .Dt BC 1  .Dt BC 1
 .Sh NAME  .Sh NAME
 .Nm \&bc  .Nm bc
 .Nd arbitrary-precision arithmetic language and calculator  .Nd arbitrary-precision arithmetic language and calculator
 .Sh SYNOPSIS  .Sh SYNOPSIS
 .Nm \&bc  .Nm bc
 .Op Fl c  .Op Fl cl
 .Op Fl l  
 .Ar  .Ar
 .Sh DESCRIPTION  .Sh DESCRIPTION
 .Nm \&Bc  .Nm
 is an interactive processor for a language which resembles  is an interactive processor for a language which resembles
 C but provides unlimited precision arithmetic.  C but provides unlimited precision arithmetic.
 It takes input from any files given, then reads  It takes input from any files given, then reads
 the standard input.  the standard input.
 .Pp  .Pp
 Options available:  Options available:
 .Bl -tag -width flag  .Bl -tag -width Ds
 .It Fl l  
 allow specification  
 of an arbitrary precision math library.  
 .It Fl c  .It Fl c
 .Nm \&Bc  .Nm
 is actually a preprocessor for  is actually a preprocessor for
 .Ar \&dc 1 ,  .Xr dc 1 ,
 which it invokes automatically, unless the  which it invokes automatically, unless the
 .Fl c  .Fl c
 compile only.  .Pq compile only
 option is present.  option is present.
 In this case the  In this case the generated
 .Ar \&dc  .Xr dc 1
 input is sent to the standard output instead.  instructions are sent to the standard output,
   instead of being interpreted by a running
   .Xr dc 1
   process.
   .It Fl l
   Allow specification
   of an arbitrary precision math library.
 .El  .El
 .Pp  .Pp
 The syntax for  The syntax for
 .Nm \&bc  .Nm
 programs is as follows;  programs is as follows:
 L means letter a-z,  .Sq L
 E means expression, S means statement.  means letter a-z;
   .Sq E
   means expression;
   .Sq S
   means statement.
 .Pp  .Pp
 Comments  Comments
 .Bd -unfilled -offset indent -compact  .Bd -unfilled -offset indent -compact
 are enclosed in /* and */.  are enclosed in /* and */
 .Ed  .Ed
 .Pp  .Pp
 Names  Names
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 .Pp  .Pp
 Other operands  Other operands
 .Bd -unfilled -offset indent -compact  .Bd -unfilled -offset indent -compact
 arbitrarily long numbers with optional sign and decimal point.  arbitrarily long numbers with optional sign and decimal point
 \&( E \&)  ( E )
 sqrt ( E )  sqrt ( E )
 length ( E )    number of significant decimal digits  length ( E )    number of significant decimal digits
 scale ( E )     number of digits right of decimal point  scale ( E )     number of digits right of decimal point
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 .Pp  .Pp
 Operators  Operators
 .Bd -unfilled -offset indent -compact  .Bd -unfilled -offset indent -compact
 \&+  \-  *  /  %  ^ (% is remainder; ^ is power)  +  \-  *  /  %  ^ (`%' is remainder; `^' is power)
 \&++   \-\-         (prefix and postfix; apply to names)  ++   \-\-         (prefix and postfix; apply to names)
 \&==  <=  >=  !=  <  >  ==  <=  >=  !=  <  >
 \&=  +=  \-=  *=  /=  %=  ^=  =  +=  \-=  *=  /=  %=  ^=
 .Ed  .Ed
 .Pp  .Pp
 Statements  Statements
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 .Ed  .Ed
 .Pp  .Pp
 Functions in  Functions in
 .Fl l  .Fl lm
 math library  math library
 .Bl -tag -width j(n,x) -offset indent -compact  .Bl -tag -width j(n,x) -offset indent -compact
 .It s(x)  .It s(x)
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 .Ar scale  .Ar scale
 influences the number of digits to be retained on arithmetic  influences the number of digits to be retained on arithmetic
 operations in the manner of  operations in the manner of
 .Xr \&dc 1 .  .Xr dc 1 .
 Assignments to  Assignments to
 .Ar ibase  .Ar ibase
 or  or
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 All variables are global to the program.  All variables are global to the program.
 `Auto' variables are pushed down during function calls.  `Auto' variables are pushed down during function calls.
 When using arrays as function arguments  When using arrays as function arguments
 or defining them as automatic variables  or defining them as automatic variables,
 empty square brackets must follow the array name.  empty square brackets must follow the array name.
 .Pp  .Pp
 For example  For example
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 .Pp  .Pp
 prints approximate values of the exponential function of  prints approximate values of the exponential function of
 the first ten integers.  the first ten integers.
 .Sh FILES  
 .\" /usr/lib/lib.b      mathematical library  
 .Bl -tag -width xxxxx -compact  
 .It Xr \&dc 1  
 Desk calculator Proper.  
 .El  
 .Sh SEE ALSO  .Sh SEE ALSO
 .Xr \&dc 1  .Xr dc 1
 .Rs  .Rs
 .%A L. L. Cherry  .%A L. L. Cherry
 .%A R. Morris  .%A R. Morris
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 .Nm  .Nm
 utility is expected to conform to the  utility is expected to conform to the
 .St -p1003.2  .St -p1003.2
 specification.  specification.
 .Sh HISTORY  .Sh HISTORY
 The  The
 .Nm \&bc  .Nm
 command appeared in  command appeared in
 .At v6 .  .At v6 .
 .Sh BUGS  .Sh BUGS
 No &&, \(or\\(or, or ! operators.  No
   .Sq && ,
   .Sq \(or\(or ,
   or
   .Sq \&!
   operators.
 .Pp  .Pp
 .Ql For  .Ql For
 statement must have all three E's.  statements must have all three E's.
 .Pp  .Pp
 .Ql Quit  .Ql Quit
 is interpreted when read, not when executed.  is interpreted when read, not when executed.
Legend:
Removed from v.1.3  
changed lines
  Added in v.1.4