C++ :: Linked List Search - Access Violation Reading Location 0xCCCCCCCC
Apr 12, 2014
I am getting an Unhandled exception at 0x00CB569E in AusitnHorton_Chapter17_7.exe: 0xC0000005: Access violation reading location 0xCCCCCCCC.
And, It puts a little yellow arrow at this line:
cout << nodepointer->value << " ";//print current node
when I try to run this program.
//Program:Make a ListNode and simple linked list class. Test the linked list class by adding varous numbers to the list and then test for membership. Then include a search function that returns the position of x on the list, if not found return -1.
I recently started learning C++ and wanted to deep a bit into process memory reading for Windows, but I get an error I don't know how to fix. I'm using Visual Studio Express 2013 as my IDE and it tells me this, when I try to run and debug:
"Unhandled exception at 0x77E3E243 (ntdll.dll) in readProcessMemory.exe: 0xC0000005: Access violation reading location 0x00000043."
The Call Stack window says following: ntdll.dll!_NtRaiseException@12() Unknown ntdll.dll!_KiUserExceptionDispatcher@8() Unknown ntdll.dll!_RtlInitUnicodeString@8() Unknown > readProcessMemory.exe!main() Line 8 C++ [External Code]
And in the Output window is this: First-chance exception at 0x77E3E243 (ntdll.dll) in readProcessMemory.exe: 0xC0000005: Access violation reading location 0x00000043. Unhandled exception at 0x77E3E243 (ntdll.dll) in readProcessMemory.exe: 0xC0000005: Access violation reading location 0x00000043.
My code should be extremely simple, I'm just trying to find a Windows window. But here's the code.
Code: #include <windows.h> #include <iostream> using namespace std; int main(){
I am getting the message Access violation reading location 0xccccccc8. when i try to print my dynamic array during the overloaded << function in my Flight class. where the error happens is surrounded by *s
I'm trying to make a menu object in SFML. So far all I've added is the ability to add buttons with text inside of them. I store the buttons in a vector and then loop through that vector to draw the buttons.
The error stems from line 24 of the 2nd piece of code.
Here's what I've got:
//MenuTest.h #include <SFML/Graphics.hpp> #include <string> #include <vector> class Menu1 { class Button1 { sf::RectangleShape body;
[Code] ....
This causes an error at the line window.draw(text); in Menu::Button::drawButton(). With the error "Access violation reading location (some memory address)".
Everything up to trying to draw the text works fine.
I would like to copy one bmp file to another using plain fstream (none 3-rd party library). I've managed to come up with something but I keep getting error:
Unhandled exception at 0x504A3442 (msvcr120d.dll) in ConsoleApplication1.exe: 0xC0000005: Access violation reading location 0x00380000.
when i try to write the content of the bmp files not the header, namely error occurs in this line:
Also i am not sure if i am doing it in a right way, meaning that even after solving this error i will copy the bmp file successfully.
Code:
// ConsoleApplication1.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include <iostream> #include <fstream> using namespace std; struct BITMAPfileHEADER { unsigned short bfType;
I have these two functions listed below. DoEvent() gets called from a window procedure whenever some event occurs. SetEvent() sets an element of the m_Events array a pointer to a Command object to handle the event. The array is zeroed in the constructor.
The error occurs on line 16 in the code in DoEvent(). Why the array is suddenly unreadable. When I call SetEvent() it works just fine, no problem.
When I step through the debugger in SetEvent i see that each element begins as 0 and the element I set is set properly. However, when I step through DoEvent() all elements in m_Events show "?????" "Unable to read memory".
I have a problem. Im testing character movement in c++ and when i compile and run this, then try to press arrow keys it says "Access violation writing location 0x011feff4.Unhandled exception at 0x770a15de in test.exe: 0xC0000005: Access violation writing location 0x011feff4.The program '[8404] test.exe: Native' has exited with code -1073741819 (0xc0000005)."
#include <iostream> #include <string> #include <Windows.h> #include <conio.h> using namespace std; void map1create(); // Function for creating the map1
I found that the program works when using these values for the rows and columns:
Rows = 2; Cols = 2;
Using any other value gives the error mentioned above. It displays a small flat surface where I want it to, but I am trying to have a large enough surface to use as a ground (like 100 x 100).
I am really desperate on trying to make my code work. The code is to find the eigen values of any given matrix of dimension NxN. The input can be the diagonal of any NxN matrix alongwith its subdiagonal. The code works fine for N~350 or so but when i go beyond that these errors appear.
First-chance exception at 0x00425ea4 in divide.exe: 0xC0000005: Access violation writing location 0x01141000. Unhandled exception at 0x00425ea4 in divide.exe: 0xC0000005: Access violation writing location 0x01141000.
But as i have never declared any variable statically and when i dynamically allocating memory with variables it should work like it does for smaller N values.
//void Fighter::LoadAnimation(...){ std::list<SCML_SFML::Entity*> entities; for(std::map<int, SCML::Data::Entity*>::iterator e = data.entities.begin(); e != data.entities.end(); e++) { SCML_SFML::Entity* entity = new SCML_SFML::Entity(&data, e->first); entity->setFileSystem(&fs); entity->setScreen(&window); entities.push_back(entity);//problem line } }
But if i change entities to a member variable, std::list<SCML_SFML::Entity*> Fighter::m_entities, it does not. Instead i get a write access violation when i try to push_back(entity). i need it to be a member variable because i need to use it in other member functions.
I'm trying to figure out how to insert a node into a linked list at a particular location based on a time..I have this declared outside of everything globally.
struct aTime* head = NULL; And then this function that is used to add nodes (aTime structs) to a linked list. It adds the first node fine, but not subsequent ones. I think this is because I have while p-> != NULL but it is always going to be null when the function is called since I create a new aTime struct. So I guess my question is how, after one struct has been added at the beginning, do I point to the head node and traverse the list, insert a node, and make sure everything is still linked? Do I need another temp aTime struct?
Code:
void add_time(char name[LENGTH], int seconds) { struct aTime *p; p = (struct aTime *) malloc(sizeof(struct aTime)); if (head == NULL) { strcpy(p->name, name); p->seconds = seconds; }
What is "if(prev)"? Wouldn't "prev" always have the same value? Secondly, if tmp is NULL (which will be the case when the loop if(ptr->val == val) finds a match the first time it is run), is *prev assigned a NULL?
I have a linklist program I've written that seems to work just fine at least, it outputs the right information. However when it comes to the end and says press any key to continue, it crashes when I press a key says debug assertion error rather than just exiting. I haven't gone back and put in comments yet, I know I need to get used to commenting as I go />/>
#ifndef LIST_H #define LIST_H #include <iostream> #include <cstdlib> using namespace std; template <class T> class LinkList {
[Code] ....
Another bit of information. It was working without crashing when I only had the intlist functions called. When I added the doublelist is when I began getting the error however now if I remove the doubelist and go back to just having the intlist calls it still gives the error.
I've got this program that I'm working on. Most of the code is from a video tutorial, but I was editing it to be able to search for an element by name. That's working fine, but suddenly the part of the program that prints out all the elements starts in an infinite loop after I input two elements, and search for one.
The code above is supposed to be a binary search tree. The main outcome for this program is to display the tree in C each time the user inserts or deletes a value.
Since I am a newbie in C programming, I first tried creating a code that would simply display the values in the tree after a user inserts and deletes, before I proceed to displaying the exact tree.
But when I run it the following output shows:
And when I try to insert another value, It won't display anything and won't respond to any keys pressed.
I have a linkedList search function given and I am having a little trouble getting it to work. I've made a few attempts with no success. Given normal search code:
template <class Type> bool orderedLinkedList<Type>::search(const Type& searchItem) const { bool found = false; nodeType<Type> *current; //pointer to traverse the list
current = first; //start the search at the first node
[Code] .....
My attempt to make it a recursive search:
template <class Type> bool orderedLinkedList<Type>::search(const Type& searchItem) const { //bool found = false; nodeType<Type> *current; //pointer to traverse the list current = first; //start the search at the first node
I'm have troubles with this program that requires me to make a search through a Linked List and find a specified value. It also needs to be a template function. I've completed the rest of the program fine and everything runs ok except for the search function. Code below:
The program I have below. If you copy and paste it it should work. However, When I uncomment my search function I get lots of errors and I think it has to do with incorrect syntax of it being a template. Need to do this search function:
Linked.h header file
Code: #ifndef LINKED_H #define LINKED_H #include<iostream> template <class T> class Linked { private: // Declare a structure for the list
It fills the singly-linked list with 0 through 9 and calls a function to prompt the user to search for a number. I don't see any glaring errors, I was just wondering what could be done to simplify it or if there's anything I missed.
