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rpn.1: made more better

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Emma Tebibyte 2024-02-03 17:20:31 -07:00
parent 6d7522be01
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1 changed files with 9 additions and 5 deletions
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@ -20,6 +20,10 @@ rpn
Rpn parses and and evaluates reverse polish notation expressions either from the Rpn parses and and evaluates reverse polish notation expressions either from the
standard input or by parsing its arguments. See the STANDARD INPUT section. standard input or by parsing its arguments. See the STANDARD INPUT section.
Upon evaluation, rpn will print the resulting number on the stack to the
standard output. Any further specified numbers will be placed on the stack
following the last outputted number.
For information on for reverse polish notation syntax, see rpn(7). For information on for reverse polish notation syntax, see rpn(7).
.SH STANDARD INPUT .SH STANDARD INPUT
@ -28,6 +32,11 @@ If rpn is passed arguments, it interprets them as an expression to be evaluated.
Otherwise, it reads whitespace-delimited numbers and operations from the Otherwise, it reads whitespace-delimited numbers and operations from the
standard input. standard input.
.SH DIAGNOSTICS
If encountering a syntax error, rpn will exit with the appropriate error code
as defined by sysexits.h(3) and print an error message.
.SH CAVEATS .SH CAVEATS
Due to precision constraints and the way floats are represented in accordance Due to precision constraints and the way floats are represented in accordance
@ -36,11 +45,6 @@ arithmetic has rounding errors. This is somewhat curbed by using the
second-highest float that can be represented in line with this standard to round second-highest float that can be represented in line with this standard to round
numbers to before outputting. numbers to before outputting.
.SH DIAGNOSTICS
If encountering a syntax error, rpn will exit with the appropriate error code
as defined by sysexits.h(3) and print an error message.
.SH RATIONALE .SH RATIONALE
An infix notation calculation utility, bc(1p), is included in the POSIX An infix notation calculation utility, bc(1p), is included in the POSIX