Tips For Fixing 0xcccccccc Location
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In this blog post, we will share some of the possible causes that might be generating the 0xcccccccc location and then I will share some possible solutions that you can try to get rid of this problem. « Access Violation Access Violation In computing, a segmentation fault (often shorter than a segfault) or access violation is an error or error condition caused by hardware memory protection that informs a running system that (os) tools have attempted to access a convenient area (memory memory is broken). Always means that an invalid index or handle is present in the application. If the value is 0xcccccccc, the sources that the pointer is not called before this tool have a valid value (nothing else is initialized).
Either an initialized pointer, or just freed memory in a stored pointer. I think
cccccccc is now the first one and
cdcdcdcd is the second one, but it really depends on the compiler/library implementation.
For your particular code,
myMap is definitely not assigned yet, but
myMap will result in an attempt to access
0xcccccccc < / codes>.< /p>
It may also happen that several
mymap are the beginning of a class, and the class pointer is still not initialized:
mMap class tile myMap;Public: nullify f() myMap is 0;;mMap* what;what->f(); // what is a special invalid pointer
This is because the component's function is not virtual, so each of our compilers knows what code to move and passes the object pointer with a hidden parameter. Finally, the exact compiler does a calculation like:
this + offsetof(Whatever::myMap) + z Sizeof(myMap) (empty) I + * sizeof(myMap)
this one, since it is not initialized, it will probably be
0xcccccccc. Obviously the
offsetof element is null and
z are both null the first time in the loop, so you get
0xcccccccc +0++0 as memory address.debug
To do this, use the locate call stack on a function called
fillMap. Then test the performance of the one that came from where the pointer for the partner access used (
-> ) came from.
As the name suggests, I get the following problem message:
First Chance Exception in In Nyår 0x00d690d1.exe: Access Violation 0xc0000005: read location from 0xcccccccc.
Handled pass not at address 0x00d690d1 In nyår.exe: 0xC0000005: Access violation reading from location 0xcccccccc.
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#include #include "Membersregistryhead.Main() hour"interval _CrtSetDbgFlag( _CRTDBG_ALLOC_MEM_DF// which Header is in the PartnerRegister object: /////////////////////////////////////////////#ifndef REGISTRATION PARTICIPANT_H#define "Record member Memberhead_h#include #include #include.h"Course participantsRegisterPublic:SubscriberRegister();// Default constructor~ParticipantRegister();// DestructorSubscriberRegister(const SubscriberRegister &obj);// Copy constructorvoid typeOut();void createObject();invalid statement = (constant MemberRegister &obj);Private:Participant **Participant;all size;std::string something;;#end if// RegistrationRegister object cpp:// ///////////////////////////////SubscriberRegister::SubscriberRegister() size = 1; member **member = new member*[size]; for (int my partner = 0; i < size; my hubby and i ++) member[i] = new member(); RegisterSubscriber::~RegisterSubscriber()void MemberRegister::typeOut() std::cout << Subscriber->toString();// Here, ina problem arise// Member object header file:// ////////////////////////////////#ifndef PARTICIPANT_H#include #include #include Member member_h# define classPrivate: std::stringname; std::string address; std::string full string; std::string payment status; logical paid;Public: member(std::string name, std::string address);// constructor participants();// normal constructor ~Participant();// Destructor // Phrase void setName(std::string name); void setAddress(std::stringaddress); void setPaid(bool paid); // Receive std::string getName() const; std::string getAddress() const; boolean getPaid() const; // storage function // read function save(std::ofstream & void out); empty read (std::ifstream &in); std::string toString();// return a string with information about deltagaren int operator<(const Member &obj);// different types of objects by name (in alphabetical order) int operator==(const member &obj);// find object by name;// Participant object cpp:// //////////////////////////////////#include "Participanthead.h"Participant::Participant(std::string name, std::string address) // Constructor this->name = name; this->address = address; paid = false; complete string = ""; Payment status = "Avgift ej betald";Participant::Participator() // Default constructor name = "Bertil"; complete string = ""; Payment status = "Avgift ej betald";Participants::~Participants() // Destructor// togethervoid Member::setName(std::string name) this->name = name;void Member::setAddress(std::string address) this->address implies an address;void Subscriber::setPaid(bool paid) this->paid = paid;// receivestd::string Subscriber::getName() constant returns this->name;std::string Const member::getadress() echo this->address;bool Member::getPaid() const return->paid;// read and saveinvalid member::keep(std::ofstream&out) from << toString();invalid member::read(std::ifstream &in) getline(in, name); getline(input, address); getline(in, paid status); should (paidstatus == "Avgift betald") set paid (true); otherwise it's obvious if (paidstatus == "Avgift ej betald") set paid (false); // create a stringstd::string member::toString() this->completestring is equivalent to this->name + "n" + this->address + n" everywhere; provided (that->paid) this->completeteststring += "Avgift betaldn"; moreover, if (!this->paid) this->completeststring += "Avgift ej betaldn"; return this->fullth line;// sort object by process name (in alphabetical order Participant::operator)int < (const member and object) if(this->getName() getName() == obj.getName()) return 1; profit 0;