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    <p>In fact, on windows by default it seems that the default size of the stack allocated for a program is 1MB.</p> <p>But, with your program, when you do <code>PGMImage img</code>, you are allocating a way too much.</p> <p>Explanation :</p> <pre><code>#define MAX 800 // Find it in your link typedef struct {unsigned char red; unsigned char green; unsigned char blue; }RGB_INT; struct PGMstructure { int maxVal; int width; int height; RGB_INT data[MAX][MAX]; }; typedef struct PGMstructure PGMImage; </code></pre> <p>So when you do <code>PGMImage img</code>, you are allocating <em>4 bytes</em> + <em>4 bytes</em> + <em>4 bytes</em> + <em>800 x 800 x 3</em> bytes. It gives <strong>1 920 012</strong> bytes, in other words, almost 2 MB.</p> <p>In cpp :</p> <pre><code>std::cout &lt;&lt; "Sizeof PGMImage : " &lt;&lt; sizeof( PGMImage ) &lt;&lt; std::endl; // gives : "Sizeof PGMImage : 1920012 </code></pre> <p>So it is normal that on windows you get this error.</p> <p>If you want to solve this error :</p> <pre><code>PGMImage* img = (PGMImage*)malloc( sizeof(PGMImage) ); </code></pre> <p>And that's it ! The allocation on the Heap solve this problem, but don't forget to <code>free</code> it at the end !</p> <p><em>A good explanation of the reason of the limit on the stack : <a href="https://stackoverflow.com/questions/2152601/is-there-a-maximum-limit-to-the-size-of-a-variable-that-should-be-allocated-on-a">Is there a maximum limit to the size of a variable that should be allocated on a stack?</a></em></p>
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    1. PO".exe has stopped working" I am unable to initialize two structures of the same defined type. I'm using Eclipse in C on windows 7
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    1. USCommunity
    1. USPierre Fourgeaud
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    1. COThank you Pierre!
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      1. USuser2503627
    2. COI entered `PGMImage* rotateimage = (PGMImage*)malloc( sizeof(PGMImage) );` I want to enter the values in the img struct into the rotateimage struct. Like this: `rotateimage.height = img->height`. It does not recognize 'rotateimage' as a struct, giving me an error "request for member 'height' in something not a structure or union"
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    3. CO`rotateimage->height` :) Take a look at : http://msdn.microsoft.com/en-us/library/b930c881(v=vs.71).aspx
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      1. USPierre Fourgeaud
 

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