Written using a home-made assembler, ResEdit, and WriteNow 3.0.
RPN: A small calculator using the Reverse Polish Notation paradigm.
RPN is a small application intended as a replacement for the stock desk accessory calculator. Displayed in the application's window is an input register and the stack. No space is wasted displaying numbers and keys since input is done with the keypad. A rodential interface would be needlessly silly. Four operators are supported using SANE: +, -, *, and /. The "=" key rolls the stack, poping the last number.
RPN should be compatable with all Macintoshes using all systems. It was written and tested on an LCIII running 7.5.1. With system 7 and above, of course, the application can function as a desk accessory by dropping it or an alias of it into the "Apple Menu Items" folder.
The size of the application is a diminutive 7369 bytes running in a block of 40 kbytes.
RPN is shareware. If you use the program as it is or as a programming example, compensate me with a registration fee of at least $2.00. Merely stuff an envelope with a couple of bills, address it, stamp it, and drop it into a snail-mail box. You will sleep easily at night with a clear conscience.
