CODEWITHSUNDEEP
android
user1946705
user1946705

Reputation: 2888

Calculator app for Android

I'm thinking about an algorithm for building a calculator. My first idea was to do an array and after click some button save the value of pressed button to this array. And after click the button "=" I would walked this array via cycle for (for example) and from entered value I will make up the expression - for example: 1.iteration - "5" 2.iteration - "5" 3.iteration - "+" 4.iteration - "8" END OF ARRAY

So the result expression will be: 55+8

But I'm not sure, if this idea is right - I think it's a bit complication -- exist some pretty way, how to do?

Thanks

Upvotes: 0

Views: 453

Answers (2)

Aravindhan
Aravindhan

Reputation: 15628

dont use an array.. just use variables its enough. have one text box just type in the text box say(55). after you pressed any operators(+,-,*,/) just store that(55) in A variable. after that you enter 8. add that 8 to the 55.. use two variables.. any doubt means pls communicate with me

Upvotes: 0

senola
senola

Reputation: 782

I would tokenize the string and build an abstract syntax tree which you could then walk to evaluate the children

Upvotes: 1

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