Server Help

[Versetti]

I'm trying to make a addon for my biller and when the biller tries to add data in my linked lists it will say "Unhandled exception in SSGBiller.exe 0xC0000005: Access Violation."

Would anyone know how to fix this if you need to see anything else just ask and I'll show you some of that code you might need to help e out with this problem.

[Cyan~Fire]

Lol show the code. Access violation is probably the most generic C++ error you can ever get.
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[Mr Ekted]

Access violation is usually attempting to read/write NULL ptr, uninitialized ptr (ie garbage). As cyan said, post your code.
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[Versetti]

Here is the liked lists I made for it:

Code: Show/Hide class EntryBoardUser{ public:    EntryBoardUser();    ~EntryBoardUser();    int UserID;         //Never Gets Replaced    char Name[32];      //Replace1 -- 1    char Email[100];   //Replace1 -- 2    char Sig[256];      //Replace1 -- 3    char title[32];      //Replace1 -- 4    int posts;         //Replace2 -- 1    int warnlevel;      //Replace2 -- 2    int Level;         //Replace2 -- 3    bool banned;      //Replace2 -- 4 -- (1 = False) (0 = True)    bool limitread;      //Replace2 -- 5 -- (1 = False) (0 = True)    ///put the stuff here }; class BoardUser{ public:    BoardUser();    ~BoardUser();    EntryBoardUser* item;    BoardUser* next;    BoardUser* prev;    //the node is here }; class ControlBoardUser{ public:    ControlBoardUser();    ~ControlBoardUser();    BoardUser* head;    BoardUser* tail;    void clear();    void remove(char *);    bool Replace1(int ,char *,char *);    bool Replace2(int ,char *,int ); };

then my append function is the first thing that gets the error:

Code: Show/Hide void append(int ID,char *Name,char *Email,bool limit = false,int oplevel = 5,char *title2 = "Newbie"){    ControlBoardUser *parse;    if(parse->head && parse->tail){       parse->head=parse->tail=new BoardUser;       parse->head->item->UserID = ID;       memcpy(parse->head->item->Name,Name,32);       memcpy(parse->head->item->Email,Email,100);       memcpy(parse->head->item->Sig,0,0);       strncpy(parse->head->item->title,title2,32);       parse->head->item->posts = 0;       parse->head->item->warnlevel = 0;       parse->head->item->Level = oplevel;       parse->head->item->banned = false;       parse->head->item->limitread = limit;       UserID2++;    }    if(parse->tail){       BoardUser *parse2 = new BoardUser;       parse2->item->UserID = ID;       memcpy(parse2->item->Name,Name,32);       memcpy(parse2->item->Email,Email,100);       memcpy(parse2->item->Sig,0,0);       strncpy(parse2->item->title,title2,32);       parse2->item->posts = 0;       parse2->item->warnlevel = 0;       parse2->item->Level = oplevel;       parse2->item->banned = false;       parse2->item->limitread = limit;       UserID2++;       BoardUser *oldtail = parse->tail;       parse->tail = parse2;       parse2->prev = oldtail;       oldtail->next = parse2;    } }

and the error is when I ever try to write to the linked list it will cause that error can you help?

[Mr Ekted]

God I hate C++. Versetti, first of all, you are not showing enough code for me to figure out what you are trying to do. Secondly, the code that you do show is clearly very wrong in many ways. You can't use memcpy() here. Very bad. Very dangerous. Here's a generic function that shows proper linked list "add to tail" functionality...

Code: Show/Hide void List::AddNewNode (blah blah) { Node *node; if (node = new Node(blah blah))    {    if (node->prev = m_tail)       m_tail = m_tail->next = node;    else       m_head = m_tail = node;    } }