Search DaniWeb - deallocation

Deallocation of memory to array of objects 15 Years Ago by suho My program dynamically allocates memory to an array of objects : [CODE] class particle { public: int x[D],shifted,ID; particle() { shifted=0; ID=-1; } }; // Array of all the particles particle* particles; int main() { for(a=0;a<s_num;a++)… Re: Deallocation of memory to array of objects 15 Years Ago by necrolin If you're deleting an array then I believe the syntax is delete []myArray. Here's an example that compiles.. [CODE] #include <iostream> using namespace std; class Object { public: Object() { cout << "Object::Object()\n"; } ~Object() { cout << "Object::~Object()\n"; } }; int main() { Object* o = … Re: Deallocation of memory to array of objects 15 Years Ago by necrolin If you have an array and you delete it with the command: "delete array" then it still frees all of the memory because the memory was allocated in one big chunk. However, it does not call the destructors. Therefore, you want to use: "delete []array" instead which then tells it to delete an array and all the destructors get called… Re: Deallocation of memory to array of objects 15 Years Ago by Narue [B]>delete (particles+i);[/B] You can only delete addresses that were returned by new. [ICODE]particles+i[/ICODE] will only reference such an address if [ICODE]i[/ICODE] is zero. The whole of [ICODE]particles[/ICODE] can be released in a single statement (no loop necessary): [code] delete[] particles; [/code] Your code suggests that you're … Deallocation of memory problem 15 Years Ago by KaZu88 This is my program, it causes memoryleaks. I show only a small part where the problem exist. Starts with the header then the cpp. ParticipatorRegister.h [CODE] #ifndef PARTICIPATORREGISTER_H #define PARTICIPATORREGISTER_H #include "Participator.h" class ParticipatorRegister{ private: Participator **arr; int inc, init, elem;… Re: Deallocation of memory problem 15 Years Ago by Rajesh R Subram [QUOTE=KaZu88;1088440] Detected memory leaks! Dumping objects -> {117} normal block at 0x003960E0, 40 bytes long. Data: < > CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD CD Object dump complete.[/QUOTE] That dump is not very helpful, don't you think? As a first step, if you redefine new to DEBUG_NEW, the debugger will be… Re: Deallocation of memory problem 15 Years Ago by KaZu88 Yeah I will test that, thanks :) But do you know what to type to deallocate this memory Participator **arr; this->arr = new Participator*[init]; delete xxx Re: Deallocation of memory problem 15 Years Ago by Rajesh R Subram There are multiple issues with your code. Why are you deleting with [COLOR="red"]delete[][/COLOR] while you should be simply deleting with [COLOR="Green"]delete[/COLOR]?! Besides that, there are other issues in your code, which I've fixed (take a good look into the constructor of your class - specifically the Initiate() … Re: Deallocation of memory problem 15 Years Ago by KaZu88 [CODE] #ifndef PARTICIPATORREGISTER_H #define PARTICIPATORREGISTER_H #include "Participator.h" class ParticipatorRegister{ private: Participator **arr; int inc, init, elem; void initiate(); //void expand(); public: ParticipatorRegister(); ~ParticipatorRegister(); //void save(ofstream&); //void read(ifstream&); //void … Re: Deallocation of memory problem 15 Years Ago by Rajesh R Subram [QUOTE=KaZu88;1088563][CODE] #ifndef PARTICIPATORREGISTER_H #define PARTICIPATORREGISTER_H #include "Participator.h" class ParticipatorRegister{ private: Participator **arr; int inc, init, elem; void initiate(); //void expand(); public: ParticipatorRegister(); ~ParticipatorRegister(); //void save(ofstream&… Re: Deallocation of memory problem 15 Years Ago by KaZu88 I did read your last post, just typed wrong. I show you my whole program Participator.h [CODE] #ifndef PARTICIPATOR_H #define PARTICIPATOR_H #include <iostream> #include <string> #include <fstream> using namespace std; class Participator { private: string name; string address; bool paid; public: … Re: Deallocation of memory problem 15 Years Ago by Lerner Why are you declaring arr like this: Participator **arr; instead of like this: Participator *arr; Your expand() method is wrong. Using vectors instead of arrays so you don't have to manage your own memory is probably the easiest way to correct this, however, the general way would be declare temp with the same memory as arr, copy arr to … How to allocate memory dynamically on stack ? 15 Years Ago by tajendra …for it). So, one has to keep track of deallocation call, else memory leak will get introduced. Now coming…stack. 2) No need to free memory explicitly. So, deallocation cost will be zero. 3) If function like FunctionA()…on _ALLOCA_S_THRESHOLD value. Also you need to manage its deallocation flow. _alloca is best suited to be used when… Help needed__copying the linked list 16 Years Ago by yangty152 … implicit parameter // by "deep copy semantics." Any necessary deallocation is // done along the way. if (this != &p) … // Pre: The implicit parameter has been allocated. // Post: Any necessary deallocation is done. list_clear(terms); }; void poly::copy (const poly &… Dynamically declaring two dimensional aray - Any mistake in this code?? 13 Years Ago by Muhammad Anas … or error in this code especially in the memory deallocation part. Am I correctly releasing all the memory that… << " "; cout << endl; } //...............................................................// //.................memory deallocation..............// for (int i=0; i<rows; i++) delete [] myMatrix… Re: Help needed__copying the linked list 16 Years Ago by yangty152 … implicit parameter // by "deep copy semantics." Any necessary deallocation is // done along the way. if (this != &p) { free… help with sorting program 18 Years Ago by djkross … >> arraySize; cout << endl; } else return -1; } //deallocation of memory delete [] randomArray; delete [] reversedArray; delete [] sortedArray; return 0… Problem with static STL i.e. map 17 Years Ago by vijay_choudhari … but the offset].Then how does compiler handles allocation and deallocation of variables of type static STL[i.e. static map… Problems with memory allocation and debugging 17 Years Ago by joanam … happens because as the program did not terminate correctly, the deallocation instructions were not reached, so the memory stays allocated. I… cant clean up memory? 15 Years Ago by monkey_king …'m trying to get myself acquainted with memory allocation and deallocation while writing a program that will actually be usefull for… delete operator in c++ 15 Years Ago by barige rajesh … is"<<*ptr<<endl; delete ptr; // deallocation of ptr; cout<<"p's add is… Re: delete operator in c++ 15 Years Ago by siddhant3s … is"<<*ptr<<endl; delete ptr; // deallocation of ptr; cout<<"p's add is… warning: address of local variable xxx returned 15 Years Ago by johndoe444 … that be treated differently from within main I mean allocation/deallocation(calling malloc/free) wise? Thanks. Re: warning: address of local variable xxx returned 15 Years Ago by gerard4143 … that be treated differently from within main I mean allocation/deallocation(calling malloc/free) wise? Thanks.[/QUOTE] Its wrong because the… Help on project 15 Years Ago by Zach101man … program that will demonstrate the allocation, initialization, modification, multiplication, and deallocation of two matrices. my teacher wants this into a matrix… Struggling with variable names!! 14 Years Ago by aplh_ucsc ….. I'm writting my own replacements for the memory allocation/deallocation routines malloc() and free().In that file i'm using… Beginning C++0x: Making a RAII Class 13 Years Ago by mike_2000_17 … the allocation of the memory, and can thus control its deallocation. The class invariants are guaranteed to hold upon construction. We… Transferring OpenCV image data. 13 Years Ago by pseudorandom21 … origin of image data // (not necessarily aligned) - // needed for correct deallocation */ }; class CreateImageBuffer { public: static ImageBuffer GetImageBuffer(IplImage *img) { ImageBuffer buf… Acces violation error 12 Years Ago by nuclear … be okay, I do the allocation in the constructor and deallocation in the destructor etc. I noticed that the same happens… Data structure 12 Years Ago by zahidpp … contrast various memory models with reference to pointer allocation and deallocation especially when multidimensional arrays are to be declared using pointers…