PATCH: zcalc doc

[Peter Stephenson <pws@xxxxxxx>]

This documents some existing features of zcalc.

Index: Doc/Zsh/contrib.yo
===================================================================
RCS file: /cvsroot/zsh/zsh/Doc/Zsh/contrib.yo,v
retrieving revision 1.42
diff -u -r1.42 contrib.yo
--- Doc/Zsh/contrib.yo	23 May 2005 10:11:28 -0000	1.42
+++ Doc/Zsh/contrib.yo	27 Jun 2005 10:04:21 -0000
@@ -1487,7 +1487,9 @@
 for example, `tt([#16])' to display hexadecimal output preceded by an
 indication of the base, or `tt([##16])' just to display the raw number in
 the given base.  Bases themselves are always specified in decimal.
-`tt([#])' restores the normal output format.
+`tt([#])' restores the normal output format.  Note that setting an output
+base suppresses floating point output; use `tt([#])' to return to normal
+operation.
 
 The output base can be initialised by passing the option `tt(-#)var(base)',
 for example `tt(zcalc -#16)' (the `tt(#)' may have to be quoted, depending
@@ -1499,6 +1501,28 @@
 referred to in tt(ZCALCPROMPT) as `tt(%1v)'.  The default prompt is
 `tt(%1v> )'.
 
+The output precision may be specified within zcalc by special commands
+familiar from many calculators:
+startitem()
+item(tt(norm))(
+The default output format.  It corresponds to the printf tt(%g)
+specification.  Typically this shows six decimal digits.
+)
+item(tt(sci) var(digits))(
+Scientific notation, corresponding to the printf tt(%g) output format with
+the precision given by var(digits).  This produces either fixed point or
+exponential notation depending on the value output.
+)
+item(tt(fix) var(digits))(
+Fixed point notation, corresponding to the printf tt(%f) output format with
+the precision given by var(digits).
+)
+item(tt(eng) var(digits))(
+Exponential notation, corresponding to the printf tt(%E) output format with
+the precision given by var(digits).
+)
+enditem()
+
 See the comments in the function for a few extra tips.
 )
 findex(zed)

-- 
Peter Stephenson <pws@xxxxxxx>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070


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