iOS String as equation?

[wesg]

Has anyone had success turning strings into equations?

ie. take a stored string of 2*5+6 and output 16

 

[(marc)]

You'll have to write a parser.

EDIT: This might not be trivial. I googled "c equation parser" and found this.

 

[dejo]

Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_0 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8A293 Safari/6531.22.7)

Perhaps you can use JavaScript's eval() function.

 

[PhoneyDeveloper]

This has been an assignment in CS courses since 1962. I think you'll be able to find some source code online.

expression evaluation code

http://www.google.com/search?q=expression+evaluation+code&hl=en&num=100&lr=&ft=i&cr=&safe=off

 

[wesg]

Thanks for all the suggestions. I'm going to look into storing them as actual values... we'll see how it goes.