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POCorrupted heap error when declaring a double* array
 

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  1. POCorrupted heap error when declaring a double* array
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    <p>I'm currently working on finding the sum of squared distances of two matricies, the data is held in double* arrays. the first of them stays the same while the other is cycled through using a function that returns a 32x32 array between two indices.</p> <p>However when i try and call "getTile(d,e)" after the first incrementation of "e" it throws a heap corruption exception:</p> <pre><code>double* Matrix::ssd(int i, int j, Matrix&amp; rhs){ double sum = 0, val = 0; int g = 0, h=0; double* bestMatch = new double[32*32]; double* sameTile = new double[32*32]; double* changeTile = new double[32*32]; for(int x = i-32; x &lt;i; x++){ for(int y = j-32; y &lt;j; y++){ sameTile[g*32+h] = data[x*N+y]; h++; }g++; h = 0; } system("pause"); for(int d = 32; d&lt;=512; d+=32){ for(int e = 32; e&lt;=512; e+=32){ changeTile = rhs.getTile(d,e); for(int out = 0; out &lt; 32; out++){ for(int in = 0; in &lt; 32; in++){ val = sameTile[out*32+in] - changeTile[out*32+in]; val = val*val; sum = sum + val; } } cout &lt;&lt; sum &lt;&lt; endl; sum = 0; val = 0; system("pause"); } } </code></pre> <p>The getTile(int i, int j) function:</p> <pre><code>double* Matrix::getTile(int i, int j){ double* tile = new double[32*32]; int g = 0; int h = 0; for(int x=i-32; x&lt;i; x++){ for(int y=j-32; y&lt;j; y++){ tile[g*32+h] = data[x*N+y]; h++; } cout &lt;&lt; endl; g++; } return tile; } </code></pre> <p>I believe the error occurs with the allocation of memory in the changeTile double*?</p> <p>Any help would be very much appreciated.</p>
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    1. USMarobri
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      1. POCorrupted heap error when declaring a double* array
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    1. COWhat is N and what are the inputs i and j input to the ssd() method? The definition/size of data[] would be helpful as well.
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    2. CO`tile` appears to be `return`ed from `getTile()` without having any data written into it. Is this intentional?
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      1. POCorrupted heap error when declaring a double* array
      1. USsarnold
    3. COYour code would be a lot clearer to read were you to stick with one statement per line rather than trying to squeeze them in like `double* tile = new double[32*32]; int g = 0; int h = 0;` but where are all of these `new double[32*32]`s being `delete`d? Have you considered smart pointers or any of the `std::` containers? **`double*`s are not "arrays"**, they are pointers and should be treated as such.
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      1. POCorrupted heap error when declaring a double* array
      1. USJohnsyweb
 

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