82 Topics
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| | Hello Everyone, I have an FPGA application that has some function (i.e: Matrix Multiplication) now I want to create the memory interface for FPGA communication based on the model pushed into the FPGA? For example, If we have the size of 1024 and the size of data is 10 bit …  |
 | Hi all, So before I went and posted ~800 lines of code, I have 2 questions: 1: What is the preferred way for us to post "complex" C++ (of course, this is just a .h, .cpp, and main cpp but it's still a lot of lines) that wont just be … |
| | So I have this so far, not sure how to make dollars * e^(rate*time) #include <iostream> #include <cmath> #include <iomanip> using namespace std; int main() { //declare identifiers double rate = 1; double time = 2; float dollars; float total=0.0; //initialize identifiers total= pow(exp(1.0), rate*time); cout << fixed << showpoint … |
| | IplImage *in; CvMemStorage *storage = cvCreateMemStorage (20506); CvSeq *contours=NULL; CvPoint *PointArray=NULL; for() { //image processing and feature extraction code here cvClearMemStorage (storage); //clear memory area free (PointArray); cvReleaseImage (&in); } At the end of each iteration i ma releasing memory but still i get memory shortage error after # processing …  |
 | Hello, I was recently looking through some of my code and found what I believe to be a memory leak. It is in a function that appends two strings and I am not sure how to resolve it. Here is the function: const char *strapp(const char *str,const char *s) { …  |
 | #include<iostream> using namespace std; int main(){ int fish =6; int * fishp = &fish; cout<<fishp<<endl; return 0;} this runs ok, but i get the same memory address when i cout either fishp or &fishp. how is it possible for a pointer to have the same address as the address it's … |
| | Hello, I've got a question about a project in my operating systems class. The task was to create a program that lets the user choose a variety of cpu scheduling algorithms and simulates them with random data or data from a file. I've already done it for first come first … |
| | I've been working on a small API/Library and I realized that I was returning memory that wasn't going to be consistently put on the heap or stack. So my question is this: when I return an object from a function in a Library, should that object be on the heap? … |
| | These are two simple programs. In first program, i used static array, while in second program i used dynamic array. Both programs do the same job i.e. initiaze the array by asking the user to enter the their test scores. The problem is: 1)i have read in many books that … |
| | Hello, I made an arbitrary precision integer library a few weeks ago. It works well, but is bounded by `256^(8*sizeof(size_t))` because it uses a simple dynamically allocated array to do its work. I want some way to have theoretically unbounded storage. I think that file io is probably best, but … |
| | Hi all! I'm trying to create a program that produces a memory leak. I have a program that looks like it works, but I was wanting to verify whether it actually is causing a memory leak, and that it's not just some other type of issue. It's in C++, which … |
| | Hi, I have to open and read multiple files which are in same folders. I can search and collect the whole size of those files. But the problem is with when I'm copying the files to a buffer. How can I read the multiple files? I'm using this example for … |
 | Hi, I am implementing an applicaiton which uses CPU but having a problem about allocating in GPU memory. Above all, my work environment is Windows 7 Visual Studio 2010 NVIDIA Quadro NVS 290 (256MB) When I run a piece of CUDA code: cudaMemGetInfo(&freeMem, &totalMem); I get 256MB of total memory … |
| | How many bytes of memory is allocated when you declare: double* p1[10];  |
| | Ok so am writing a program that simulates a computer system.The cpu and memory will be forked making memory a child process and cpu athe parent and i will be using pipes to let them exchange informatino. I am really lost tough on what to do next, i have loaded … |
| | Alright so I've been struggling to find the error but I simply can't. Given the following code: #include <iostream> #include <vector> enum ScriptType { SCRIPT_TYPE_CREATURE_SCRIPT, SCRIPT_TYPE_PLAYER_SCRIPT }; class Script { private: ScriptType type; public: Script(ScriptType type) : type(type) { } ScriptType getScriptType() const { return type; } }; class CreatureScript … |
| | `Inline Code Example Here`I am using a pair of pthreads that call a pair of functions for ping-pong dma data transfer that are used in a loop for data transfer from an acquisition board. For a large # of waveforms, I ultimately run out of PC memory and the program …  |
| | I have been making a C++ application and currently checking if there exists any memory leak before release. My application will be running as an object over HTTP server and it should be idle until an HTTP request comes in. Which means it should release most of memories when it's … |
 | Hi I have trouble with implementing a dynamic two dimensional pointer array on allocating memory for it. I tried it this way but not sure if it's correct. The array should contain pointers to heap allocated **Integer** objects const int size = 10; Integer *** twoD; twoD = new Integer**(); … |
| | Hi I have a question about memory address on Windows Mobile 5.0 I found application pid by task manager which I downloaded from internet. Is it possible to find memory addresses by pid on Windows Mobile ? I know that VisualC++ has built in methods but for desktop Windows. I … |
| | Im trying to increase a dynamic array by 1 element and assign a integer variable to it but recieve a heap overload error. Any advice would be appreciated. void CardSet::AddCard(int cardNum) { int* tmp; nCards++; tmp = new int[nCards]; for(int i = 0; i < (nCards - 1); i++) { … |
| | currently I'm rewriting old euler solutions into classes so i can store them in a library. I wrote a program that digitizes a number so it can check to see if it a pallindrome, The base class digitize dynamically allocates memory for the size of a number and stores each … |
 | I think there are memory leak in my application, perhaps the problem is in a part of code status = myPubSubSubscribe.Receive(fsReceivedTopic, myBufferSubscribe, myHeader, 0); if (status == PS_ENGINE_UNAVAIL) { printf("Unable to connect to the pubsub engine: %s\n", PSPubSub::Status2String(status)); myBufferPublish.FreeBuffer(); myBufferPublish.~PSBuffer(); myPubSubPublish.~PSPubSub(); myBufferSubscribe.~PSBuffer(); myPubSubSubscribe.~PSPubSub(); return; }  |
| | The title explains it well. I wish to know which variables I need to delete when my program closes. I assume you don't have to use the delete keyword on *every* variable that you initialize. Thanks in advance. |
| | Small part of my code: `GetWindowThreadProcessId(hWnd, &dwID);` `hProcess = OpenProcess(PROCESS_ALL_ACCESS, NULL, dwID);` `string value =" [_this] exec \"\\newfolder\\scripts\\start.sqf\"";` `WriteProcessMemory(hProcess, (LPVOID) 0x09BA3F95, (LPVOID) &value, sizeof(&value), NULL);` I am 100 % sure it has to do with my `value` being a `string` but I haven't found anything helpful elsewhere, even though I've … |
| | Hi I am getting this error when running a very similar code like the below. I have memory problem,but i dont know how can solve it. please help. Thanks in advance. /////////////////////////////////////////// ~~~~~~~ERROR~~~~~~~~ terminate called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc Aborted /////////////////////////////////////////// ~~~~~~~~Code~~~~~~~~~ int main(){ /** Declare … |
 | At work we have a large number of unit tests that try to alert us that we have made changes that have broken our code. Many of these tests work by evaluating functions under known conditions and comparing the result with the known result. The known result is acquired by … |
| | hello :) i'm looking for an algo to find out all possible combinations of a 2d array entries, wich are (Tasks x Processors). i.e, i have to find out all possible schedules to schedule tasks against processors. numbers of tasks and processors are variable. Suppose : ............P1.......P2.......P3 .................................... T1........3 ........6..........4 … |
 | I am running into (pretty serious) valgrind issues as I run my application. As far as I can tell, my BST has some memory loss, to put it rather clinically. I've tried to create the right destructor on my BST<T> class, which contains BSTNode<T> nodes (both are shown below in … |
| | I have a program that dynamically allocates an array and uses it. The thing is that under certain situations this array will get infinitely long. As such I would like to know if/when the array has gotten too long and then start saving it to a file (where length will … |
| | class A { public : list< string> getList (){ list< string> l; l.push_back ("str1"); l.push_back ("str2"); .... … |
| | I've a question on dynamic memory. As i understand it, i can create a dynamic memory array using: xxx= new int [z]; Then I can set the value of 'z' to be whatever value i want during the program. But if i create a dynamic memory array using a predefined …  |
| | I have some code in C++ that uses an std::vector of std::strings to store an array of strings. I need to convert it into C. I thought that I would just create c versions of the functions I need (vector.back,vector.push_back,string.operator+=) but am getting lost in the double pointers. Can anybody … |
| | [CODE] #include<stdlib.h> #include<conio.h> #include<stdio.h> #include<iostream.h> struct pro { int no; int btime; int atime; int stime; int etime; int wtime; int ttime; int rtime; }proc[100],junk; void sort(int n) { pro temp; for(int i=0;i<n;i++) for(int j=0;j<n;j++) { if(proc[j].atime>proc[j+1].atime) { temp=proc[j]; proc[j]=proc[j+1]; proc[j+1]=temp; } } } pro min(int n,int & t) { … |
| | In my program I read in a text file an decrypt the text from an array. once decrypted i then have to do through it again and search for every tenth array member and show their memory location. The code so far: [CODE] int main( ) { int* pCrypted = … |
| | I have a base class and two derived class. One derived class which inherits base class as virtual and another one as non virtual. I have given below my codin. [CODE] // This program uses virtual base classes. #include <iostream> using namespace std; class base { public: int i; }; …  |
| | How much longer until I'm the king of typos and stupid questions? Ok well in a different thread of mine there was a reference to BIOS.h. Does anyone know where to download it (If I don't have it comp making tarball sooo slow) or/and what's in it. I want to …  |
| | Hi all , here is my code for GET request to a http site, but it keeps taking memory nor releasing it, here is the code: [CODE] while(1) { hSession = WinHttpOpen( L"Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.0", WINHTTP_ACCESS_TYPE_DEFAULT_PROXY, WINHTTP_NO_PROXY_NAME, WINHTTP_NO_PROXY_BYPASS, 0); if (hSession) hConnect = WinHttpConnect( hSession, L"lalala.com", …  |
| | Hey all, (Skip down till "Question:" if you're in a rush) Context: I'm coding on an audio application which involves storing buffers of audio. I'm currently using a [ICODE]std::vector<float>[/ICODE], as a member of an [ICODE]AudioBuffer[/ICODE] class. These [ICODE]AudioBuffer[/ICODE] instances are held in another class [ICODE]ResourceHolder[/ICODE]. In the "process" callback (where … |
| | Hello! I am making a program which does many computations for a Photovoltaic system. The problem is that i get a strange segmentation fault error when I run the program. Here is where it crushes (at for-loop of calculation S5) : [CODE] commands..... ... ... /******************** WIRING *******************************/ Ni = …  |
| | I'm not known to be a very memory friendly guy but after about 4 hours debugging my lua+sdl in C++ I finally figured out how to use threads but now I have another problem. I apparently have zero knowledge of memory manangement but thats kind of ok so I've narrowed … |
| | Hello, I have a difficult memory error to find. I have narrowed it down to a small piece of code, tiny in fact, but the symptoms are baffling to me. I tried to find it with electric fence, but electric fence found nothing. The problem is complicated by my liberal … |
| | I am experiencing unexpected performance degradation when using vectors with classes. I have a csv_File class that reads in a csv file and stores the contents in a 2D vector. There's a member function that allows access, e.g. [CODE] csv_File file("file.csv"); file.access(2,2);[/CODE] To access the 2,2 element. Then, I have … |
| | Hello guys, I am trying to declare a two dimensional array in C++ on runtime. For this purpose I am asking the user about how many rows and columns should be created in the array. I have written the following code for this purpose. Apparently it is working just fine. … |
| | This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. [COLOR="Red"][B]A brief on problem:[/B][/COLOR] Lets take example problem for simplicity: - I have a GSM network with a cell in it. - Cell's coverage … |
| | All things equal, does an object of a class which has methods take up more memory resources than an instance of a class without methods. What if it is a vector of such objects? For example: [CODE] class A{ public: void DoSomething(); void DoSomethingelse(); private: int x, y; }; class … |
| | Im trying a practice problem from a textbook and here is my attempt at it, was wondering if I could get some advice both with structurally how to approach the problem, efficency, and any words of wisdom on dynamic memory. This is my study for my final exam which so … |
| | char* p=(char*)malloc(10); in the above state ment,has the memory been initialised??...what is the difference between allocatingg it and initialising it?? thanks in avdance... |
| | Hi, I've got an assignment at school that I would really like help with. I'm a total newbie. [code=c]#include <iostream> using namespace std; int main() { char chr=(char)67; unsigned int offset = 1000; char * ptr=(char*)0; ptr+=offset; cout << ptr[0] << (char)43 << (char)(chr-24) << endl; } [/code] The questions …  |
| | I am trying to dump the memory of my c++ app. [code=c++] #include <iostream> #include <fstream> using namespace std; int main () { ofstream myfile; myfile.open ("example.txt"); myfile << "Writing this to a file.\r\n"; myfile.close(); int *p; *p = 25; char b[] = "hello"; int a; for (a=0; a==-1; *(p++)){ … |
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