Question

Java calculator

Asked by: greenhal

hi I was wondering if somebody could givew me a few pointers as to how a i could implements a calculator in java
I have to be able to take in some data in file format
a b
1 2
3 2
.
.
.
1 6
and processes it by the application of functions as chosen by the user from a button panel.

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Asked On
2009-02-18 at 08:00:13ID24154428
Topics

Java Programming Language

,

Java Standard Edition

,

Algorithms

Participating Experts
2
Points
500
Comments
5

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Answers

 

by: CEHJPosted on 2009-02-18 at 08:02:20ID: 23671524

First you need to read the file and parse out the operands

See http://www.exampledepot.com/egs/java.io/ReadLinesFromFile.html

and String.split

 

by: greenhalPosted on 2009-02-18 at 08:19:01ID: 23671722

Thanks could you help me with this though its
just i need a way to do this
so for example the user chooses the following (1) ( sin a)  ( cos a) and then this is applied so that
b = B1(1) + B2(sin a) + B3(cos a) where i have to solve for B1 B2 B3 so its a system of matrix equataions could you help me with logic of how to do this?

 

by: CEHJPosted on 2009-02-18 at 08:53:52ID: 23672191

Sounds like you might need  something more elaborate. Check out the Jep expression parser e.g

 

by: ramu_src2kPosted on 2009-07-13 at 05:43:21ID: 24839103

Elaborate more, what are B!,B2 & B3.
Can you post whole problem statment

20120131-EE-VQP-002

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