2-D dynamic array

This is a discussion on 2-D dynamic array within the C++ Programming forums, part of the General Programming Boards category; Hi guys, I am trying to create a 2d dynamic array with the code: Code: char **Split_Text; Split_Text = new ...

  1. #1
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    2-D dynamic array

    Hi guys, I am trying to create a 2d dynamic array with the code:

    Code:
    	char **Split_Text;
    	Split_Text = new *char[Vigenerek.value];	// new dynamic array
    	for(i=0;i<Vigenerek.value;++i) Split_Text[i] = new char[ArrayLen];
    but digital mars keep giving me "need explicit cast to convert from int ** to char **. I don't really get what is it saying since i don't have a single int pointers. can somebody please help me?

  2. #2
    and the hat of wrongness Salem's Avatar
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    Can you put those 3 lines, and a minimal amount of support lines necessary to create a complete compilable program (it doesn't have to do anything), and post that.

    Certainly looks pretty odd to me though, as you say, no obvious sign of an int.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    I don't have much experience with dynamic arrays but can't you just say
    Code:
    char *x[WIDTH];//array of pointers to chars (one for each column)
    for(i=0;i<WIDTH;++i) 
        x[i] = new char[HEIGHT];

  4. #4
    Registered User hk_mp5kpdw's Avatar
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    Code:
    char **Split_Text;
    Split_Text = new *char[Vigenerek.value];	// new dynamic array
    for(i=0;i<Vigenerek.value;++i) Split_Text[i] = new char[ArrayLen];
    That * is in the wrong place, it needs to be:
    Code:
    char **Split_Text;
    Split_Text = new char*[Vigenerek.value];	// new dynamic array
    for(i=0;i<Vigenerek.value;++i) Split_Text[i] = new char[ArrayLen];
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

  5. #5
    and the hat of wrongness Salem's Avatar
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    Good catch hk_mp5kpdw.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  6. #6
    The larch
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    May-be there's a reason why you need an array of char arrays, but to get things done a much simpler way is:
    Code:
    #include <vector>
    #include <string>
    
    int main()
    {
        std::vector<std::string> Split_Text; //voil&#224;
    
        // or to set memory aside out-front:
        std::vector<std::string> Split_Text(Vigenerek.count, std::string(ArrayLen));
    }
    I might be wrong.

    Thank you, anon. You sure know how to recognize different types of trees from quite a long way away.
    Quoted more than 1000 times (I hope).

  7. #7
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    Thanks guys, thats very helpful

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