Help writing code (Can't think of a proper title)

This is a discussion on Help writing code (Can't think of a proper title) within the C++ Programming forums, part of the General Programming Boards category; In Java, I would do this: Code: public interface Date { public static final String[] month = { "January", "February", ...

  1. #1
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    Help writing code (Can't think of a proper title)

    In Java, I would do this:

    Code:
    public interface Date {
    
      public static final String[] month = { "January", "February", "March", etc etc};
    
    }
    or in C#, I would do this:

    Code:
    public class Date
    {
      // you can't have an array of const strings in C#
      public readonly static string[] month = { "January", "February", "March", etc etc};
    }
    How do I achieve this in C++? Like, are there static, const, etc? I promise I'd read the FAQs first, but if only I had a bit more time

    Say this would be in a separate class called Date (Actually, I think Date is a class that already exists. I'm just using date as an example). A .h file and a .cpp file.

    Would my .h file contain all these declarations, and my .cpp file be empty with an #include "Date.h"?

  2. #2
    semi-colon generator ChaosEngine's Avatar
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    use the string class
    Code:
    // date.h
    #include <string>
    
    class Date
    {
    public:
        static const std::string month[];
    };
    Code:
    // date.cpp
    #include "date.h"
    const std::string Date::month = {"jan", "feb", //etc..
    };
    "I saw a sign that said 'Drink Canada Dry', so I started"
    -- Brendan Behan

    Free Compiler: Visual C++ 2005 Express
    If you program in C++, you need Boost. You should also know how to use the Standard Library (STL). Want to make games? After reading this, I don't like WxWidgets anymore. Want to add some scripting to your App?

  3. #3
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    What is the string class for?

    How come I can declare strings without having to include the string class?

    I just include <iostream> and also use "using namespace std". Does that include strings as well?

    Oh, and should I declare the "Date" class as static as well?

    Edit: Now I'm having problems trying to retrieve those values.

    In another class, say Test.cpp, say I have an #include Date.h

    and I have something like
    cout << "The month is " << Date.month[0] ;

    This gives me an error with compilation. Saying "expected primary-expression before '.' token"

    What am I doing wrong?

    Edit: Problem solved. It's supposed to be
    cout << "The month is" << Date::month[0];
    right?
    Last edited by markcls; 03-25-2007 at 11:30 PM.

  4. #4
    Deathray Engineer MacGyver's Avatar
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    What is the string class for?
    The string class is for representing strings.

    How come I can declare strings without having to include the string class?

    I just include <iostream> . Does that include strings as well?
    Simple answer: Yes.

    Oh, and should I declare the "Date" class as static as well?
    Declaring the class as static?

  5. #5
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    Hahaha sorry, I don't think I have to set the class as static (I don't even know why I thought of that). Got it working already. Thanks

  6. #6
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    >> I just include <iostream> . Does that include strings as well?
    No.

    On some compilers you might be able to do some stuff with strings (because <iostream> might include some other header that declares some of string) but you should not rely on that because many compilers don't do that. So if you use the string class, #include its header <string>. In general, always #include the header that declares the stuff you need even if it seems to work without it. This will avoid hard to find errors later in your coding.

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