Yesterday, I received an almost unused original HP-12C Platinum edition from my grandfather. I've had some experince with register calculators before (In school one of our teachers told us to download a HP-42 emulator from [url]http://thomasokken.com/free42/[/url] he then continued to teach us the basics of RPN and some of the basic functions of the calculator, such as storing numbers in different registers and retrieving them)
Now my question to you is: How do you program it?
I mean, I've programmed the example in the manual (25% of [i]n[/i]) altough it didn't really give me much insight in how to program it.
I've tried (and failed) to program the V=(4*Pi*r^3)/3 where the only user input number would be [i]r[/i].
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