structs

This is a discussion on structs within the C Programming forums, part of the General Programming Boards category; Hey guys just wondering if there is a simple way to allocate memory for each pointer in my loadData function ...

  1. #1
    Musicman - Canora
    Join Date
    Aug 2005
    Location
    Melbourne
    Posts
    252

    structs

    Hey guys just wondering if there is a simple way to allocate memory for each
    pointer in my loadData function from the structs in my .h file.


    Code:
    load.c
    int loadData(GJCType* menu, char* menuFile, char* submenuFile)
    {
            
    }
    
    
    typedef struct category* CategoryTypePtr;
    typedef struct item* ItemTypePtr;
    
    /* Structure definitions. */
    typedef struct price
    {
       unsigned dollars;
       unsigned cents;
    } PriceType;
    
    typedef struct item
    {
       char itemID[ID_LEN + 1];
       char itemName[MAX_NAME_LEN + 1];
       PriceType prices[NUM_PRICES];
       char itemDescription[MAX_DESC_LEN];
       ItemTypePtr nextItem;
    } ItemType;
    
    typedef struct category
    {
       char categoryID[ID_LEN + 1];
       char categoryName[MAX_NAME_LEN + 1];
       char drinkType;      /* (H)ot or (C)old. */
       char categoryDescription[MAX_DESC_LEN];
       CategoryTypePtr nextCategory;
       ItemTypePtr headItem;
       unsigned numItems;
    } CategoryType;
    
    typedef struct gjc
    {
       CategoryTypePtr headCategory;
       unsigned numCategories;
    } GJCType;

  2. #2
    Just Lurking Dave_Sinkula's Avatar
    Join Date
    Oct 2002
    Posts
    5,006
    Given this:
    Code:
    int loadData(GJCType* menu, char* menuFile, char* submenuFile)
    It doesn't matter if you try to allocate memory or not. These are just local copies.

    [criticism type="constructive" level="poor"]
    Mentally I've attached your user name to "Mr. Seg Fault". You seem to not only be playing 20 questions, but 20 threads. Is it possible that you can post a reasonably-sized snippet of an actual [single-module (because then it would be easier for at least me to play along)] bit of code that demonstrates your actual problem?
    [/criticism]
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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