*** glibc detected ***

[smartalgorithm]

hello everybody :)
here is a little program, that saves vector to a file, and read file to a vector...
it seems, that all is okey, except one thing,,, after program end comes message:
*** glibc detected *** /home/aram/Dropbox/workspace/experimetlet/Debug/experimetlet: corrupted double-linked list: 0x00000000023b8100 ***

i am wondering why it happens...?!

please, if someone can, help me.

here is a link to cpp file.
http://dl.dropbox.com/u/53352759/eso.cpp

im using Ubuntu Linux, with kernel 3.2, gcc 4.6.3 and glibc 2.15
thanks.

[Cubbi]

Switch from passing pointers to vectors to passing vectors themselves, by reference.

As written, your readfile receives a pointer to a vector, obtains a reference to the vector with k[0], and then makes a pointer to that vector, reinterprets it as char*, and trashes memory with read.

What it should do is take the vector by reference, obtain a reference to its first element with k[0], obtain a pointer to that element, reinterpret it and read the array with read.

EDIT: also, int size1=sizeof(k) is wrong and should be int size1=k.size(); (after making k a reference)

[smartalgorithm]

BIG BIG BIG thank YOU Cubbi, its work, and you are the best !!!! :)
YOU have not hesitated to look my code, and you are great, thank you again.

nevertheless its my first program that doing that kind of things(mean working with files) and i still can not
understand why its work now, and why it didn't before ,,, hahaahahah :-D

maybe i will understand it later :-)

[smartalgorithm]

hey.
but some strange things still happening
wen trying to call after loading from file... for example vector_x[n].push_back(class_name(x,y,z))... program crashes :-(
why it can be...
also crash happens when trying to call vector_x[n].class_function().....
but before loading from file all works perfectly

[smartalgorithm]

IT IS STRANGE for me because
1. after loading vector from file, my program still can check some values from x_vector[n]...
it checks by loop whale x_vector, and if it find given ID(for example it at n-th element), then program checking its password, and if both are met it calls vector_x[n].menu();...
2. password check is another function in class_name... so, why all is ok while checking password with class function,
here it is:

class User_Ordinary : public User_empty
{
public:
  User_Ordinary(std::string name, unsigned short int password, unsigned int money);

  //unsigned int get_user_cash();
  bool is_user_password_true(unsigned short int password);
  void menu();
private:

  void change_user_password();
  void check_user_balance();
  void cash_user_money();
  unsigned int user_money;
  unsigned short int user_password;
  unsigned int user_cash;
};

in another class User_ordinary used in declaring vector

class User_ROOT : public User_empty
{
public:
  User_ROOT();

  void main_menu();
  void menu();

private:

  std::vector<User_Ordinary> users_database;
  std::vector<int> is_user_blocked;

};

so when we calling users_database[n].push_back(User_Ordinary("kuku", 1000, 0));
or users_database[n].menu();

program stops with crash :(