Rrr Calculator
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It's a Dos Navigator-like calculator - expressions are evaluated while you are typing them.

It does not contain many buttons to type numbers - uses simple edit box.
You can move / edit / delete / insert / paste / do whatever in the edit box.

There are some shortcuts that can make your life easier when using this prog,
e.g. Alt+D(H,...) copies result as decimal(hexadecimal, ...) to clipboard,
Ctrl+<number 1-8> stores result in memory 1-8 and Alt+<number 1-8> inserts contents
of a memory into edit box.
One can even type M1...M8 in the edit box and that will be evaluated as the number
stored in that memory.
To obtain info about any button, just let it show you its tooltip.

Another useful thing is file "Custom.txt" - it's a definition file for your
functions and constants.
View it to find out more (and edit to add your constants/functions).
If you change the file and save changes you made, choose "reload custom file" item
from "Options" menu. Then, these expressions can be used in the edit box.

