Calculator on C#

This is a discussion on Calculator on C# within the C# Programming forums, part of the General Programming Boards category; Hey! I have a calculator with buttons, and when I click the numbers or operators, it goes to a string ...

  1. #1
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    Mar 2012
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    Calculator on C#

    Hey!
    I have a calculator with buttons, and when I click the numbers or operators, it goes to a string array. So;

    Press 3
    Press +
    Press 2
    Press =

    and my array is str[0]='3' str[1]=.... so on...

    And also I have a C code which calculates the string you entered with some algorhytms and gives a double value as a result. So the question is;

    How can I send my STR array in C# to my C program? I mean I want to use my C program as a source code. and How to return that double value to my C# program?

    For now, I don't want to change my C codes into C# codes. I want it to keep as is. Just use it as a source code. Is that possible?

    Thanks in advance

  2. #2
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    You use P/Invoke ( Platform Invoke Tutorial (C#) ) to communicate with unmanaged libraries from C#. I have to say though, using P/Invoke to perform such a very simple task as calculating a character array of digits and operators seems bizarre.

  3. #3
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    I think he's talking about spawning the C program and sending it the string as command line parameters. is this correct?

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