how do i make a calculato in c++??

gamedudex · Post by **gamedudex** » Tue Apr 15, 2003 2:37 am

i'm trying this out...i found some infor online using ask jeeves...not helping enough..

how do i make an 8 function calculator in c++ that performs addition, subtraction, multiplication, division, exponentiation, base-ten logarithm, factorial, and quit operations?

BlackAura · Post by **BlackAura** » Tue Apr 15, 2003 3:14 am

The actual calculation bit is quite easy, but the hard part is the interface. I'll have a look around, and see what I can find.

Tangent · Post by **Tangent** » Tue Apr 15, 2003 4:49 am

Is this for your homework again? Be honest, now.

toastman · Post by **toastman** » Tue Apr 15, 2003 7:15 am

BlackAura wrote:The actual calculation bit is quite easy, but the hard part is the interface. I'll have a look around, and see what I can find.

You could do a command line interface that would be quite simple or if you knew some basic Windows programming you could make one with that. (I have a book on Win98 programming that has an example which makes a calculator using the dialog boxes. O_o)

gamedudex · Post by **gamedudex** » Tue Apr 15, 2003 8:35 am

Tangent wrote:Is this for your homework again? Be honest, now.

no, i just saww this problem and i wanted to try it out

Mask of Destiny · Post by **Mask of Destiny** » Tue Apr 15, 2003 9:47 am

If it's going to be command-line based you could be slick and parse out a complex expression and do order of operations. Easiest way to do that is to convert it from infix (2 + 3) to postfix(2 3 +) and then calculate.

BlackAura · Post by **BlackAura** » Tue Apr 15, 2003 10:06 am

toastman wrote:
BlackAura wrote:The actual calculation bit is quite easy, but the hard part is the interface. I'll have a look around, and see what I can find.
You could do a command line interface that would be quite simple or if you knew some basic Windows programming you could make one with that. (I have a book on Win98 programming that has an example which makes a calculator using the dialog boxes. O_o)

Which, compared to "answer = first + second", is quite complex.

If you want it to work like a proper calculator, you need some way to parse the input, and decide what you want to do.

toastman · Post by **toastman** » Tue Apr 15, 2003 3:52 pm

For command line you need two things.

Binary trees
Reverse polish notation

I've said all I need to.

AmadeusZull · Post by **AmadeusZull** » Tue Apr 15, 2003 6:26 pm

search for stack calculators in c++. you should find many many old assignments.