51,593 Topics
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 | hey guys, im building a small prediction software, the GUI is in PHP and i want to do the data crushing in C. (sequence, matrix and multiple variables isolation) i know the basics in C, but im no C expert. Is it possible to pass from C to PHP other … |
 | Have some problems with the qt destructor. I'm working on QtCreator: here's the class: the .cpp #include "controller.h" Controller::Controller() { } Controller::Controller(MovieRepo *movrep, MovieValidator *movval){ this->movrep=movrep; this->movval=movval; } void Controller::addMov(int id, string title, string desc, string type)throw(ValidatorException){ Movie* mov=new Movie(id, title, desc, type); movval->validate(*mov); movrep->store(*mov); } const Movie* Controller::getById(int id){ … |
| | Hi, I'm working on some coding and ran into the problem that my multidimensional arrays are too large for my RAM. After reading a lot of articles, I figure that what I need to do is dynamically allocate the size of the array? The array that I need to do … |
| | I'm trying to have my function return an OPENFILENAME struct. Problem: It returns it fine and everything except that I cannot print the filetitle :S At the moment, it prints the path of the file perfectly fine but when it comes to printing the file title via cout, it prints …  |
| | So I'm writing a program to mimic the "find" command in linux. I have everything taken care of, but I cannot figure out how to format the string from ctime, mtime and atime. I know the arguments are struct time_t, but I can't find to convert it to a formatable … |
| | I'd like to represent an integer with a value between 0-100,000. Unsigned short int (range 0-65535) is too small. Unsigned int (range 0 - 4294967295) is big enough, but for a large data set this wastes a lot of space. Does there already exist a class that is in between? … |
 | Hi, I found this forum with some google searches and I really enjoyed reading some Q&As here. I love C++, I love C++, did I told you yet I love C++ ? I hate C#, I really hate C# !!!!. did I told you yet I hate C# ? I'm … |
 | When I handle WM_MOUSEMOVE in my window prodedure, HIWORD(lParam) and LOWORD(lParam) are both a little off. It's returning a point that is slightly to the left and slightly above where my cursor actually is... What's really weird is that as I move the cursor closer to the top left of … |
| | i found out how to get each individual word from a text file. Now i am trying to limit each line to a certain number of characters. If the line limit is 10 and the word "string" starts at position 8, i need to make a newline and put "string" …  |
| | hie guys could anyone help me on how i can read a delimited file as i view all customer details #include <fstream #include <iostream> #include <string> using namespace std; int main () { int choice [1]; string name; string idnumber; string address; string surname; string FileName; fstream myfile; string line; …  |
| | How to hide and then to show again when I want to a standard menu toolbar in MFC doc view application? |
| | Hello I would like to know how to make .bat files with a time trigger some thing like this: I make a file with autorun and it ahs a time trigger and after two monts it opens this file... can someone please help me resolve this problem..... thanks... |
 | Hi there. I am having some trouble trying to figure out how to delete a pointer that is held in a vector. int main() { vector<Test*> iVector1; vector<Test*> iVector2; vector<Test*>* pVec1(&iVector1); vector<Test*>* pVec2(&iVector2); pVec1->push_back(new Test(11)); pVec1->push_back(new Test(12)); pVec2->push_back(new Test(23)); pVec2->push_back(new Test(24)); //delete iVector1.at(0); delete iVector1[0]; iVector1.at(0) = new Test(21); pVec1->at(1) … |
| | Write a program that prompts the user to input the start time and the stop time in hours and minutes (use 24 hour format), and then print out the time spent in work in hours and minutes. For example: Enter start time : 9 30 Enter finish time : 13 … |
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| | Hi guys, Your typical C++ beginner here. I'm using the renowned Deitel C++: How to program to learn C++. I am my own mentor and here's what I can't comprehend: What's a Dangling Reference? According to Deitel C++: How to Program and I quote "Functions can return references, but this … |
 | Hi guys, I am having a small problem on using QNetworkAccessManager in QThread. The error message is: "Object::connect: No such slot QThread::replyFinished(QNetworkrReply\*)" And my code is header class SSLReceive : public QThread { //Q_OBJECT public slots: void replyFinished(QNetworkReply* net_reply); protected: void run(); private: void initialize(); QNetworkAccessManager* manager; QSslConfiguration config; }; … |
 | it is my first time which I want to use ethernet card to read some date from PLC my application/software . does any body has an expereince? is it possible introduce a example or any reference for this isuue? thanks a lot in advance. |
 | Hello Daniwebers! I was just reading This C++0x Beginner Tutorial: http://www.daniweb.com/software-development/cpp/tutorials/373787/beginning-c0x-making-a-raii-class And I was confused by something: " `int_vector(int_vector& aV);` > Obviously, this type of constructor would allow the transfer of the resource, since the source object can be modified and put into an empty-state (or "zombie-state"). But there are … |
| | I have been trying to write a program for the game of life and have been having some issues. The rules are: 1. Any live cell with fewer than two live neighbours dies, as if caused by under-population. 2. Any live cell with two or three live neighbours lives on …  |
| | Hello great people, I have a challenge passing array into functions.. I will be very grateful for quick responses.. THANKS  |
| | i don't know how it happen but the exe formed after compilation was 1.23 MB which has never happen before. |
 | #include <Stdafx.h> #include <iostream> #include <math.h> #include <stdlib.h> #include <time.h> using namespace std; int rand_0toN1(int n); int main() { int n, i; int r; srand(time(NULL)); // set a seed for random-number generation. cout<< "Enter number of dice to roll: "; cin>> n; for(i = 1; i <= n; i++) { …  |
| | Hello, Well I am trying to finished the following progam and I need help with 2 functions [i]reverse book(s)[/i] and [i]return book[/i]... If someone can told me points where to start I will appritieate:: below is my code, note that I don't know if the [i]customer_book_count[/i] is work since I … |
| | Hello, I'm new to this community and well to C++ itself. I'm trying to create a graphical calculator which displays the parabolic path of a projectile in the form of a graph plot, but the problem is that I don't even know how to plot points on C++.So can any … |
| | Hi there this is my first post here :) So I got an assignment about TicTacToe project here's a basic header and main file of my project I think i should made a basic one before adding some "advanced" features please help with the logic of the command undo thank … |
| | Hi. I am wondering if a log file can be created in a header which is associated with a try-catch block. Below is my stripped down code for the log_header.h and log_test.cpp Here is log_header.h #include<fstream> #include<iostream> using namespace std; class thrower{ //fstream myfile2; public: void errormessage(); }; void thrower::errormessage(){ … |
| | #include <iostream> #include <iomanip> #include <fstream> const int NUM_SURVEY=3; using namespace std; struct Survey { int IdentificationNumber; double annualIncome; int numberOfHouseMember; }; void getData(); void calculateAverage(); void findPoverty(); void printReport(); int main() { getData(); calculateAverage(); findPoverty(); printReport(); system("pause"); return 0; } void getData() { Survey Households[NUM_SURVEY]; int i; cout<<"------------Enter " … |
| | I am currently using code::blocks but i am experinsing trouble trying to link the ws2_32.lib and other libraries. I tried visual studio express but it doesnt work with me. What are some good FREE c++ compilers that have very easy library linking and are rather user-friendly and that i can … |
| | In my project (Borland C++ Builder, Windows Xp ) am using following code for opening the file TOpenDialog *OpenDialog; OpenDialog->Filter = "all files (*.*)"; OpenDialog->InitialDir="::{20D04FE0-3AEA-1069-A2D8-08002B30309D}"; OpenDialog->Execute(); But the "My computer" tab is empty its not showing the drives. Rest "My Rescent Documnets" , "Desktop", "My Documents", "My network drives" all … |
| | Hi! Only two windows-dialogs in my programm. On button click I do this->EndDialog(0); MyWiew mw; mw.DoModal(); ShellExecute(0, NULL, fdlg.m_ofn.lpstrFile, NULL, NULL, SW_MINIMIZE); But MS WORD opens file and starts only when mw is closed. How to start it with the mw together? Thanks in advance. |
| | Hello everyone; I've been struggling with trying to figure out how to get this struct program to work and I'm at a total loss on this. Basically I need to create two structs POINT which will have an X and Y values, and a LINE struct which will include 2 … |
 | I have a file, 'date-list.txt' which has date in it. For example , 20 May 2012 . Now I want to compare this date with current system date and show the difference in days . How can i compare dates and shows difference in days in C++.? Im really a … |
| | hi in this if statment i want to paste image if lever[r][c]==1 else i want to add space. i dont know how to add space. my think is that i would have to use dbText() or dbPrint() function? if(level[r][c] == 1) { //dbSprite(1, x*32, y*32, 1); dbPasteImage(level[r][c], x, y); x+= … |
| | The file contains the instructions. I need help by tonight. Please Help!!!! main.cpp: #include <iostream> #include <fstream> #include "addressbook.h" #include "addressbook.cpp" int main(){ ifstream inStream("input.txt"); string line, header, token; vector <string> tokens; getline (inStream, header); AddressBook myAddressBook; while(!inStream.eof()) { getline (inStream, line); cout << line << endl; int x=0, y=-1; … |
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| | Hi again and thanks in advance ! Last question ! I have to create a class called polygon (not normal) that has in private the number of sides and the length of each side and in public that has 2 constructors (the one has as variables the number and each … |
| | i have a array 10X13. where it say 1 i want to print image called wall. ok so the array part is easy. iam pretty sure its fine. less continue. const int ROWS = 10; const int COLS = 13; int level[ROWS][COLS] = { {1,1,1,1,1,1,1,1,1,1,1,1,1}, {1,0,0,0,0,0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,0,0,0,0,0,1}, {1,0,0,0,0,0,0,0,0,0,0,0,1}, … |
| | Hello everyone, I want to start learning C++, because that's what we do at school and I really need to know it. But there's a problem, I don't know where to start from, what to do and such. At school I can't understand anything from the teacher, so that won't … |
| | Hi all and thanks in advance for your help ! I have a very simple class called circle and i wanna add the ostream << so i can have the ability in main to write cout<<a<<b<<c; the theme is i'm getting many compile errors in the same row eg iso … |
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| | Hi all, FIrst I have to say my experiences with C++ are very low. But since we're given an assignment to develop a simple game in C++ now I have to try it out. But I have the basic idea on OOP and programming. So friends where should I start. … |
| | Hi again and thanks in advance !Any help would be very appreciated cause i'm having a test tomorrow and i need some help! So i wanna have a class called Bag and a subclass Set.In bag we have 2 constructors, an insert function , getsize function , getsum (which adds … |
| | Hello all. I am wokring in windows forms right now. I have a form with many large split containers inside of it, in these split containers are a few more split containers. When i re-size the splitter on any of my split containers. All of the child splitters will change. … |
| | hey how to clear the screen in c++ i m using dev c++. clrscr()doesnot work |
| | Hi again, all--- I'm trying to write a function that will add two matrices and output the resulting matrix. I've got two matrices already and everything, now i just need to write the function that i can use to call in my switch loop (The program must read two matrices, … |
| | How will I implement colors in a console application developed using C++? What are the color codes of different colors? |
| | Hi, I have a matrix of size of n x m, how can the file be read without any given size, thus making it possible to be read with any given size matrix?. Here is the scenario, I have a matrix of size 3 x 2 then someone wants to … |
| | Hello, I am trying to create a Login system, so far it writes users correctly however it doesn't seem to be reading it correctly as it always claims the username/password is incorrect even though when I check the file it is. Could someone help, thanks! class TestLogin { public: char … |
| | Hello I am looking to read a file into a 2d array to show which spaces have been taken/ haven't taken whiey will show a # if not taken and a T if taken, so far I just have a text file I created which shows like this: T # … |
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