RPNCalc in Lazarus

[tailkinker]

A fairly simple RPN scientific calculator.  Probably only works under Linux.  I would compile it for Windows or Mac as well, but Microsoft and Apple are actively hostile to developers, users, people in general...

https://github.com/tailkinker/RPNCalc

[VisualLab]

A fairly simple RPN scientific calculator.  Probably only works under Linux.  I would compile it for Windows or Mac as well, but Microsoft and Apple are actively hostile to developers, users, people in general...

https://github.com/tailkinker/RPNCalc

You mean their "fancy" (excessive) requirements for placing apps in their "app stores"? Can't you also put compiled versions of your program on GitHub?

[srvaldez]

good day tailkinker
it compiles and runs OK in Windows, but I think that the order of y^x are wrong, 2 ENTER 3 y^x should give 8 not 9
<edit>
I edited the source in the y^x section and was puzzled that Lazarus would automatically apply the change to following if-then block, never seen that before

[tailkinker]

You mean their "fancy" (excessive) requirements for placing apps in their "app stores"? Can't you also put compiled versions of your program on GitHub?

No, I mean the fact that it's nearly impossible to get a working dev environment running for free.    Couldn't keep a Windows 10 virtual box stable long enough to compile, and unless you're stupid enough to actually buy a Mac, you can't install MacOS at all.

[tailkinker]

good day tailkinker
it compiles and runs OK in Windows, but I think that the order of y^x are wrong, 2 ENTER 3 y^x should give 8 not 9
<edit>
I edited the source in the y^x section and was puzzled that Lazarus would automatically apply the change to following if-then block, never seen that before

Good to know it compiles cleanly under Windows.  And yeah, the power function is backward.  I'll fix that in my source and push it.  Thanks for catching that.
Also, the most recent commit includes some visual improvements.

[Thaddy]

The forum is littered by RPN calculators.
The oldest I remember is by Marcov and I believe I also added one. (both are really, really old)
That is because RPN is pretty much a standard educational task in CS.
There are undoubtedly many, many more..., forgive me if I did not mention you.

I also added a Forth interpreter somewhere in the distant past. (Forth ~= RPN based language)

[jwdietrich]

It is nice and compiles well on the Mac as well, but the code is still buggy. For example calculating the BMI, a simple task, results in a crash.

[jwdietrich]

The forum is littered by RPN calculators.
The oldest I remember is by Marcov and I believe I also added one. (both are really, really old)
That is because RPN is pretty much a standard educational task in CS.
There are undoubtedly many, many more..., forgive me if I did not mention you.

I also added a Forth interpreter somewhere in the distant past. (Forth ~= RPN based language)

Creating an RPN calculator is an elegant way to develop something useful.

To add another example: The TRURL project is a quite universal class library for creating calculators using reverse Polish notation in Object Pascal.