Replace Operators with Variables?

[darkmist]

int x = 5;
int y = 3;
char z = '+';
int theFinalAnswers = x z y; // 5 + 3

Ok, needless to say this code doesn't do what it's meant to. I am doing a card game solver that has thousands of possible equations and I'm going to do them all in this program to see if any have the answer that equals the "goal". I considered using functions for the operators but I'm rather new the iPhone SDK. Can you call functions from the ___viewcontroller.m file? Should you just add it before my IBActions function as a int functions? Inside the @implementation thing/block?

[darkmist]

Anything? Any ideas? Even if you're clueless please say so because I feel alone.

[smasher]

No 'ffense, but it sounds like you're in the "hello world" phase and not ready for a project like this. I'd get a book, do some sample projects first. To your questions:

I considered using functions for the operators but I'm rather new the iPhone SDK. Can you call functions from the ___viewcontroller.m file?

I'd use methods, but yes you can call functions and methods from any .m file.

Should you just add it before my IBActions function as a int functions? Inside the @implementation thing/block?

Yes, you declare methods in the @interface of your .h file and then write them in the @implementation of your .m file.

[Duncan C]

Originally Posted by darkmist

Anything? Any ideas? Even if you're clueless please say so because I feel alone.

Of course it's possible to call functions from a view controller.

It sounds like you need to write an equation parser.

You might do a google search on iPhone RPN calculator. RPN (Reverse Polish Notation) is pretty easy to implement, and I'm pretty sure I've seen one for iOS.

Writing your own equation parser is doable, but not a project for a beginning programmer.

[darkmist]

Originally Posted by smasher

No 'ffense, but it sounds like you're in the "hello world" phase and not ready for a project like this. I'd get a book, do some sample projects first. To your questions:



I'd use methods, but yes you can call functions and methods from any .m file.

Should you just add it before my IBActions function as a int functions? Inside the @implementation thing/block?

Yes, you declare methods in the @interface of your .h file and then write them in the @implementation of your .m file.

I know but this is a real thing that no one I talk to can figure out.

[darkmist]

Originally Posted by Duncan C

Of course it's possible to call functions from a view controller.

It sounds like you need to write an equation parser.

You might do a google search on iPhone RPN calculator. RPN (Reverse Polish Notation) is pretty easy to implement, and I'm pretty sure I've seen one for iOS.

Writing your own equation parser is doable, but not a project for a beginning programmer.

Thank you, I'll start with this.