Memory allocation

This is a discussion on Memory allocation within the C++ Programming forums, part of the General Programming Boards category; I'm just wondering if it's possible to allocate a matrix with the "new" command in any way like this: matrix=new ...

  1. #1
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    Red face Memory allocation

    I'm just wondering if it's possible to allocate a matrix with the "new" command in any way like this:

    matrix=new float [size][size];

    I've tried most things, and can't find it anywhere on the net.



    Leiken

  2. #2
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    Code:
    int** matrix=new int*[size];
    
        for(int i=0;i<size;i++)
            matrix[i]=new int[size];

  3. #3
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    it's possible.

    float ** maze;

    maze = new float*[sizeA];
    for(int i = 0; i < sizeA; i++)
    {
    maze[i] = new float[sizeB];
    }

    where sizeA and sizeB are integers. Also look up how to delete the dynamically memory so declared to prevent memory leaks in your program.

  4. #4
    Registered User Dual-Catfish's Avatar
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    The answer to your question: No.
    You have to use the code that Sorensen gave you.
    Deleting this memory is as simple as

    delete[] maze;

    The rest should be automatically done when you call this.

  5. #5
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    >Deleting this memory is as simple as delete[] maze;

    After looping through and deleting the indivdual pointer to floats using a similar method to the allocation.

    Code:
     for (i=0;i<size;i++)
            delete [] maze[i];
    
        delete [] maze;

  6. #6
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    Thanks

    Thanks loads guys! I'm happy now..

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