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Reverse Polish Notation (RPN) is a math notation in which each operator follows its two operands. I own an HP 48G calculator which uses RPN, and when I tried to use the windows calculator I had so much trouble that I wrote my own calculator. Basically, it has a stack of numbers; any time an operator is pressed, that operation is carried out immediately on the two items on the bottom of the stack, or the stack and the input if there is anything in the input. This method reduces the requirements for parenthesis and makes calculating equations/functions relatively easy: instead of (sqrt(5+8))/(8*
hi everyone! I need some help with my rpn calculator. I first translated it from vbscript to autoitscript and that's when i stumbled on problem one: (46) : ==> Array variable has incorrect number of subscripts or subscript dimension range exceeded.: $Stack[ubound($Stack)] = $Item ^ ERROR After that (and i know this from testing it as a vbscript) it can't work with negative numbers: "1 - - 2" to Reverse Polish notation = "1 - 2 -" gives me the build in error... Can you guy's help me with my code pleas? Func Print($what,$er = 0) $t = '' if $err <> 0 then
I initially created this to improve my C# understanding and what a learning curve it was. So I decided to directly translate the C# source code I had into AutoIt as a way of showing off the >Stack UDF (which you will need). Of course it can be changed not to use the Stack UDF, but why reinvent the wheel and make life even more difficult. If you don't understand RPN or the Shunting-Yard algorithm, then please look at the links below. Sources: https://en.wikipedia.org/wiki/Shunting_yard_algorithm, https://en.wikipedia.org/wiki/Reverse_Polish_notation and http://www.slideshare.net/grahamwe