Initializing multidimensional array in a class

This is a discussion on Initializing multidimensional array in a class within the C++ Programming forums, part of the General Programming Boards category; Hi, How can I initialize a multidimensional array in C++. Below doesn't work. Is there any way other than looping? ...

  1. #1
    Samuel shiju's Avatar
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    Thumbs up Initializing multidimensional array in a class

    Hi,
    How can I initialize a multidimensional array in C++. Below doesn't work. Is there any way other than looping?
    Code:
    //Header file
    class Arena { 
            private: 
                    int map[2][2]; 
    }; 
    
    //CPP file
    Arena::Arena() { 
            map= {
                         {1,2},
                         {3,4}
                      }; 
    }
    I am using MS 2005 C++ express edition.
    Be conservative in what you do, be liberal in what you accept from others.
    RFC 793, "Transmission Control Protocol."


  2. #2
    Algorithm Dissector iMalc's Avatar
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    QUOTE=shiju]Hi,
    How can I initialize a multidimensional array in C++. Below doesn't work. Is there any way other than looping?
    Code:
    //Header file
    class Arena { 
            private: 
                    int map[2][2]; 
    }; 
    
    //CPP file
    Arena::Arena() { 
            map= {
                         {1,2},
                         {3,4}
                      }; 
    }
    I am using MS 2005 C++ express edition.[/QUOTE]You can initialise 2 dimensional arrays just fine in C++. However you are not doing initialisation, you are dong assignment; You can't do that, and there is no simple or efficient alternative.

  3. #3
    Samuel shiju's Avatar
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    Dec 2003
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    Thanks for the reply.

    You can initialise 2 dimensional arrays just fine in C++. However you are not doing initialisation, you are dong assignment; You can't do that, and there is no simple or efficient alternative.
    How can I do the initialisation?
    Be conservative in what you do, be liberal in what you accept from others.
    RFC 793, "Transmission Control Protocol."


  4. #4
    Registered User
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    Jan 2005
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    7,317
    You would normally initialize a class member in the initialization list. However, you cannot initialize an array in this way. You have to assign new values to each entry in the array. Just give a new value for each one, e.g. map[0][0] = 1;.

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