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POPass by referencing not maintaining its integer value
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copied!<p>I am making a new question because i deemed it to be a different topic to my one about my earlier problem here: <a href="https://stackoverflow.com/questions/20195482/c-trouble-looping-through-arrays-define-in-other-source-files">Trouble looping through arrays define in other source files</a></p> <p>The problem i current have is that i pass in a size_t value by reference to another function, i then set the value of said size_t inside that function, which i can then you in another function.</p> <p>The problem i am facing is that when i pass in the size_t variable, the function that sets the value sets it's value correctly but when i return to source file where the variable is declared it has "random" values again.</p> <p>Anyone have any ideas why this is happening?</p> <p>system_handler.c</p> <pre><code>size_t ship_size; size_t asset_size; mayday_call* mday_ptr; ship* ship_ptr; rescue_asset* assets_ptr; mday_ptr = read_mayday_file(); ship_ptr = read_ship_locations(&ship_size); assets_ptr = read_recuse_assets(&asset_size); printf("ships size : %d\n", ship_size); printf("assets size : %d\n", asset_size); </code></pre> <p>ship.c</p> <pre><code>ship* read_ship_locations(size_t* size){ //no_of_lines is an unsigned int //locof is a char array containing a file name no_of_lines = (count_lines(locof) -1 ); printf("number of lines = %d \n", no_of_lines); size = (unsigned int)no_of_lines; size = no_of_lines; } </code></pre> <p>rescue_assets.c</p> <pre><code>rescue_asset* read_rescue_assets(size_t* size) { //no_of_lines is an unsigned int //locof is a char array containing a file name no_of_lines = count_lines(locof); printf("number of lines = %d \n", no_of_lines); assets = calloc(no_of_lines,sizeof (rescue_asset)); size = (unsigned int)no_of_lines; printf("size : %d\n", size); } </code></pre> <p>Console Output:</p> <pre><code>please enter the file name for the ship locations data: ships_1.txt number of lines = 4 size : 4 Please enter the file name for the rescue assets data: rescue_assets.txt number of lines = 37 size : 37 ships size : 134513984 assets size : 0 </code></pre>

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