At 04:45 PM 12/4/2004, Max Noel wrote:
On Dec 4, 2004, at 23:30, Alan Gauld wrote:
to make it request for input(s) of say a simple math like "1 2 3 45 + - * /".
Look at raw_input()
But if you are that much of a beginner you need to take several steps back and try one of the tutorials, they all cover raw_input fairly early on...
And finally doesn't RPN put the operators first? Or is it me thats getting confused fromtoo much Lisping recently?...
Nope, RPN calculators (such as the HP48GX, IMHO the best calculator ever made) require you to input the operands first, then the operators. It's both easier to implement and more intuitive (not to mention way faster to both input and compute) once you've gotten the hang of it.
You can probably do a very basic RPN calculator in less than a hundred lines of code, using raw_input() and a stack (well, a list's append() and pop() methods).
For grins I just wrote one that takes '1 2.3 - 3 4 5 + * /' as input and prints -0.0481481.... 8 lines of Python. That indeed is less than 100. Took about 7 minutes to code and test.
Bob Gailer
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