1Infix2Postfix(3)      User Contributed Perl Documentation     Infix2Postfix(3)
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NAME

6       Affix::Infix2Postfix - Perl extension for converting from infix
7       notation to postfix notation.
8

SYNOPSIS

10         use Affix::Infix2Postfix;
11
12         $inst=Affix::Infix2Postfix->new(
13           'ops'=>[
14                 {op=>'+'},
15                 {op=>'-'},
16                 {op=>'*'},
17                 {op=>'/'},
18                 {op=>'-',type=>'unary',trans=>'u-'},
19                 {op=>'func',type=>'unary'},
20                ],
21                 'grouping'=>[qw( \( \) )],
22                 'func'=>[qw( sin cos exp log )],
23                 'vars'=>[qw( x y z)]
24                );
25         $rc=$inst->translate($str)
26         || die "Error in '$str': ".$inst->{ERRSTR}."\n";
27

DESCRIPTION

29       Infix2Postfix as the name suggests converts from infix to postfix
30       notation. The reason why someone would like to do this is that postfix
31       notation is generally much easier to do in computers. For example take
32       an expression like: a+b+c*d. For us humans it's pretty easy to do that
33       calculation.  But it's actually much better for computers to get a
34       string of operations such as: a b + c d * +, where the variable names
35       mean put variable on stack.
36

AUTHOR

38       addi@umich.edu
39

SEE ALSO

41       perl(1).
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45perl v5.12.0                      2000-01-04                  Infix2Postfix(3)