How Zen calculator works

Zen calculator is operated by repeatedly typing the make command. The calculator is controlled by the time that the command is run. Only the second part of the time is read, everything else is ignored. Zen calculator uses a stack based postfix notation to get inputs.

XX:XX:00:            +
XX:XX:01:            -
XX:XX:02:            *
XX:XX:03:            /
XX:XX:04:            Push current number
XX:XX:06 - XX:XX:09: Delete entire stack

For any other value, the final digit of the second hand is appended to the current number. The calculator uses a stack based postfix notation.

Example timeline:

Code was compiled at: 3:12:14 3:12:22 3:12:30 3:13:04 3:13:16 3:13:19 3:14:04 3:15:02

Equivalent dc command: 420 69 *

If at any point you need to restart your calculator, simply run make restart.

How do I get the results of my calculation?

Just read the very human readable resulting source code in scratch.c

Why did you make this

No clue.

Should I use this calculator?

No.

Did you learn anything from making this?

No.

Was this worth your time

Probably not.

What time are you writing this?

10:21 am but I've been awake all night writing this thing.