HP Forum Archive 14

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Oldie question...HPX V1N4 Space Shuttle Lander game Message #1 Posted by Gene on 16 Nov 2004, 3:38 p.m. Page 19 and 20 of the HPX Journal V1N4. Has a space shuttle landing simulator for the HP41. Questions: 1) Steps 109 and 155 are listed as "EXP". The other steps in the listing are fairly evident, but this one I'm not sure about. Is this "e^x"? or "10^x"? or ? The program has number entry lines where the EEX key is used to enter 1E3 for example. The program has -15 in the X register prior to this step. 2) More general question, I guess. Anyone ever try this? :-)

Re: Oldie question...HPX V1N4 Space Shuttle Lander game Message #2 Posted by bill platt on 16 Nov 2004, 5:40 p.m., in response to message #1 by Gene Hi, I don't know much at all about the 41c, but isn't EXP usually natural, and ALOG usually the "antilog" of Log base 10?

Re: Oldie question...HPX V1N4 Space Shuttle Lander game Message #3 Posted by Gene on 16 Nov 2004, 11:23 p.m., in response to message #2 by bill platt True, but since the listing shows x^2 and y^x, I would have thought that the exponential function would have been e^x. That's what I think it is, but the program listing didn't explain that abbreviation. :-) Gene

Re: Oldie question...HPX V1N4 Space Shuttle Lander game Message #4 Posted by Thibaut.be on 17 Nov 2004, 9:11 a.m., in response to message #3 by Gene Maybe they mean EEX... ?

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