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POCheck for proper memory deallocation in C
 

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    <p>Hello everyone!</p> <p>i am trying to make an ascii tetris in C. </p> <p>However i am not yet very experienced on pointers so i would like to ask you if these functions i made, allocate and free memory correctly ( meaning that they don't leave memory leaks).</p> <p>This is the function i call to create the tetris board :</p> <pre><code>char** InitTetris( int size_x , int size_y ) { /* InitTetris allocates memory for the tetris array. This function should be called only once at the beginning of the game. */ //Variables int i; char** tetris = NULL; //Allocate memory tetris = ( char** ) malloc ( size_x * sizeof ( char* ) ); for ( i = 0 ; i &lt; size_x ; i++ ) { tetris[i] = ( char* ) malloc ( size_y * sizeof ( char ) ); } return tetris; }//End of InitTetris </code></pre> <p>And this is the function to free the memory :</p> <pre><code>void ExitTetris ( char** tetris , int size_y ) { /* This function is called once at the end of the game to free the memory allocated for the tetris array. */ //Variables int i; //Free memory for ( i = 0 ; i &lt; size_y ; i++ ) { free( tetris[i] ); } free( tetris ); }//End of ExitTetris </code></pre> <p>Everything handled from another function</p> <pre><code>void NewGame() { //Variables char** tetris; /* Array that contains the game board */ int size_x , size_y; /* Size of tetris array */ //Initialize tetris array tetris = InitTetris( size_x , size_y ); //Do stuff..... //Free tetris array ExitTetris( tetris , size_y ); }//End of NewGame </code></pre> <p>Everything works fine on the program, i just want to make sure that i don't litter peoples RAM ... can you please check my method?</p>
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    1. USGiwrgos Tsopanoglou
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    1. COStack Overflow isn't a code evaluation site. Check with colleagues or fellow students as the case may be. Perhaps they'll have input.
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    2. COWhat operating system are you using? If you're on Windows, I'd suggest acquiring a copy of windbg and learning how to use it. It can help you track down memory leaks in your code. Some tutorials can be found at http://cfc.kizzx2.com/index.php/detecting-memory-leaks-with-windbg-the-modern-and-free-way/ and http://cprogrammers.blogspot.com/2006/09/windows-memory-leak-analysis-using.html
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    3. COAnd if on a unix-alike system consider [valgrind](http://valgrind.org/).
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