Help
Although the D'ni calculator is very simple to use, I think I should give a short introduction.
The Calculators' buttons have different colors:
white data entry yellow basic calculation red Special commands green torans/degree conversion blue Sign change
White buttons:
-
;
-
You can either type Arabian digits or D'ni digits. Example:
,
,
possible
,
,
possible
,
,
not possible
Yellow buttons:
,
,
,
,
I think I don't have to write much about this buttons. They are working like in any calculator. You can see the last pressed operation sign at(?in) the left side of the D'ni-display. If you haven't typed a number, you can change the operation sign by pressing another yellow button (Note: only works with +, -, x, ÷, not with =).
Although it is not possible to mix up D'ni digits and Arabian digits, it's possible to mix up D'ni and Arabian numers. Example:
,
,
,
,
possible
Red buttons:
,
,
,
The-Button starts a completely new calculation.
The-Button deletes the actual number. This is useful if you typed a wrong number and don't want to start a new calculation.
The-Button deletes the last digit. Example:
,
,
,
: The display will show:
,
,
,
: The display will show:
With the-Button you can decide if the calculator will round the result, or if it cuts off the digits after the comma. I had to introduce this button because the D'ni calculator can't show commas. We do not know how the D'ni wrote numbers like 0.5 or pi, for example.And I didn't want to make my calculator being wrong. (btw, have you ever thought about this: How wrote the D'ni 0.5? They could use a comma: [0][,][12][12][12][12][12]...! I don't think that is very useful. Or they could use a fraction line: [1][/][2]. But then, how would they write numbers like pi?)
Green buttons:
,
This button converts a number into torans.
This button converts a number into degree.
Example:
,
,
,
: The display will show:
, because 860 torans are ca 5°.
The Blue button:
This button changes the sign. 349 will change to -349, for example.
Some other notes:
1. If the calculator rounds a number, this is shown by these signs:
(arabian numbers)
(D'ni numbers)
2. If you cause an error (Example: 34 ÷ 0 ), the displays will show this:
(arabian numbers)
(D'ni numbers)
This is like if you had pressed the-Button, so you don't have to press
or
again.
3. JavaScript is not a very fast language, so don't be impatient if you use my program.
Enjoy!
Simon Riedl
September 1999