Build a Calculator using Array

Question

I would like to build a basic calculator using C#.

However, I aim to build one which performs calculation only after the equal button is clicked. And I think that arrays need to be used.

For example, when someone type in "10+12/2-2", the calculator will display "10+12/2-2 = 10" after the "=" button is clicked.

Any idea how to do it?

Thank you very much for your help.

Sumit Jolly · Answer

Dear Anne You need expression parser where you enter such formula and get the output. Now two ways to do that: # Reinvent the wheel: this approach you've to write your own code to split the 10+12/2-2 into operator & operand then BODMASS ... get the output as 10. Fairly time consuming # the other option is to use any package and pass 10+12/2-2 as input and you'll get output as 10. Easy simple I hope you like this better. Use any expression evaluator based on ANTLR  e.g.. download below http://csharpeval.codeplex.com/ http://www.codeproject.com/Articles/241830/a-Tiny-Expression-Evaluator