51,593 Topics
 | |
| | I need to be able to read and write huge files that nearly weighs 20+GB and I need to do it fast. Any suggestions or tips? Thanks. |
| | Can anybody tell me what's wrong with my selection sort of linked lists? It's meant to sort the whole node, not the data. #include <iostream> #include <iomanip> using namespace std; typedef struct node { int DATA; node *NEXT; }; node *HEAD = NULL; void Create(int data); void Display(); void Sort(); …  |
| | included is my entire program... i know exactly what the problem i am having with this is, i just cant figure out the logic to fix it... ive tried about 10 different things so far. I have it so you can input which position you start at... then go around … |
| | Hello. I have a unique situation. I have so many text box's in my form that i wound up making a text box array. Now each text box i make i have to give it a mouse clicked event and mouse moved event. I cannot write these event functions for … |
| | Hi, Does anyone know how to create a delay in C#? I dont like to use Thread.Sleep because it makes the GUI unresponsive. Do you know of any good alternatives?  |
| | Assignment #2 Write two classes Class RestaurantMenu that has the following members class RestaurantMenu { double price[10]; string Menu[10]; int numMeals; public: RestaurantMenu(); void AddToMenu(string s, double d); void DeleteFromMenu(string s); void ShowMenu(); double FindMeal(string s); }; The Constructor: will fill the price array with zeros and fill the Menu … |
| | hello, I want to get File Name in specific folder with specific extension by using CPP in linux.. example.... suppose Full File Pathname is /data1/test.txt then I want to handle a code with directory /data1/ and extension .txt then code should get file name as "test". this can be achieved …  |
| | Hey all, I'm a beginner programmer and need help here. I can't figure out how to translate a word that begins with a consonant. I have all the code to translate a word that begins with a vowel, and those words translate correctly, but I cannot get the words with … |
| | Hello, I am in the process of creating a program that accepts random numbers, put them in an array and sort them using different types of sorting algorithms. I then passed the array as an argument to the "BubbleSort" function, however, when I try to call the array in the … |
| | Hey guys. I am somewhat new to the C++ language and was wanting to make a basic text editor. For this i was going to use Nodes and linked list to accomplish this. the main thing i need help with at this moment is creating a command prompt for the …  |
| | I was reviewing the code at the following two sites. I noticed that memory allocation "new" has been used to allocate space for the Node(s). How are they freed?. very good codes. http://visualcsamples.blogspot.com/2010/11/sparse-matrix.html http://www.syntax-example.com/Code/implement-subtract-function-big-number-992.aspx |
 | I know the purpose of keyword but then I still not really know when should i use. But I sure I will optimize my code. So is it ok to i use volatile keyword on all my variables? So that it won't optimize the wrong thing.  |
| | /***** The prompt i have is : use a class with 3 member functions named InputMatrix, Calculate, and OutMatrix. The program will prompt the user to (e)enter the matrix data, (c) to calculate the matrix multiplication, (d) to display the input and output matrices, and (q) to quit. no exit() … |
| | if ive a 1000 songs,using shuffle whats the probability, on average, how many tracks will be played before a previous song plays again. tricky probability Q, getting a few different answers, with some variation of accuracy!! thanks |
| | #include<iostream> using namespace std; struct Student_Record{ int id_num; int assignment; int quiz; int test; char grade; }; void get_data(Student_Record &p); int calc_mark(Student_Record p); Student_Record read_data(); void print_all(const struct Student_Record p{}); int main() { Student_Record amir,naim, amirNaim[2]; int amirtotal_mark, naimtotal_mark; get_data (amir); amirtotal_mark=calc_mark(amir); if (amirtotal_mark>=60) amir.grade ='p'; else amir.grade='F'; naim= read_data(); …  |
| | I have a project going (the idea for which I got from a website a couple of years ago) and its been going pretty well. However, I have come upon a strange error, which I can't find the source of (well, I know the source but I don't know what … |
| | Hey guys, I'm getting some kind of linker error. Any help would be appreciated. Here is what I have.. Header File: #ifndef _LinkedSortedList_ #define _LinkedSortedList_ #include "LinkedNode.h" #include "SortedList.h" template <class Elm> class LinkedSortedList : public SortedList<Elm> { public: LinkedSortedList(); ~LinkedSortedList(); void clear(); bool insert(Elm newValue); bool getfirst(Elm &returnValue); void … |
| | Hi ive developed a code that does 2 things. It is about 20 students doing a test and getting a mark out of 100. First is using the class, it will look in a file, display the names of all the students(20) and their respective test scores.It will also show … |
| | I Got STUCK ON PART 7, would appreciate it if someone can help out. I have it due on sunday Thanks we are going to implement a slightly different version of Roulette. In our version there will be only one player and the winner is determined solely by the slot … |
| | I am getting the error from the title, when I try to execute this piece of code : list<Part>::iterator i = bullets.end(); --i; if (!dartCollided) { dartCollided = true; Part *temp = &(*i); &(*i) = new BrokenPart(*i); //line giving the error delete temp; } Could someone help me point out …  |
| | I am teaching myself C++ and wrote a program that does the queue data structure. It runs corectly. I would like some feedback on how I can improve the program to make it run faster, use fewer lines of code, or be clearer to someone else. I haven't added my … |
 | can anyone send the c++ code to count the number of repeated words in a text file...  |
| | Hi im trying to create a code where it would read from a separate text file some names and grades, then display them. However i am asked to use a class to "store"(if thats the word) them as below: #include <iostream> #include <fstream> using namespace std; class student { private: … |
| | I Got STUCK ON PART 7, would appreciate it if someone can help out. I have it due on sunday Thanks we are going to implement a slightly different version of Roulette. In our version there will be only one player and the winner is determined solely by the slot … |
| | I need to take difference between two dates in normal date format like "2012-03-30 17:21:33.027" using time_t..previously i was using unix timestamp so i used data type long int...but i need to know how to compare using time_t... plz help.....  |
| | A program to solve the following problem. You can use C, C++, C#, Java or Haskell to code your solution. **The problem** You have a block of platinum that can be exchanged in your bank either for cash or for smaller blocks of platinum. If you exchange a block of …  |
 | Hello Everyone , I Have Made a Simple C++ Code And I Get Some Errors I Have Been Trying To Solve this For Like 2-3 Days :( I am a Beginner in C++ #include <fstream> #include <iostream> #include <cstdlib> using namespace std; int main() { for char name[100]; int age; … |
| | Write a C++ program such that its execution will keep asking the user to enter a pair of integers, start and finish, and will terminate when either start>finish, or EOF or an invalid input has been encountered. Every time a new pair of integers start and finish are read, the … |
| | Hello. I have some problems with recieving text from ListBoxItem. My code is below: ListBox list = (ListBox)this.FindName(e.Parameter.ToString()); ListBoxItem item = (ListBoxItem)list.Items.GetItemAt(0); //****here is exception**** T.Text = item.Content.ToString(); list.Items.RemoveAt(0); The exception throws: Unable to cast object of type 'System.String' to type 'System.Windows.Controls.ListBoxItem'. My ListBox contains numbers, but it does not … |
| | help me please this is a code #include <iostream> #include <string> using namespace std; class Student { private : int StudentID ; string FirstName; string LastName; string CourseName; double FirstExamGrade; double SecondExamGrade; double AssignmentsGrades [5]; double FinalExamGrade ; double Avr_Of_Assignment; double TotalGrade; public : void SetFirstName (string S1); void SetLastName … |
| | 1**. Write a c++ code to copy the contents of one string s1 into another string s2 by using loop where s1 and s2 are two dynamically created pointers.**  |
| | Hello all I have a bunch of aggregate elements within my array. This array is for vertex positions in OpenGL. and I need to make a switch without having to bind more data to OpenGL. To do this I must put an if statement within the array or a booleon … |
| | I'm trying to write a program that asks the users for a set of numbers which the program then sorts and counts the frequency of. I struggling with understanding arrays. I have one array in particluar called frequencyArray that I'm trying to print but it keeps returning the value 0. … |
| | Hi there, I feel really stupid since I'm a beginner at OpenGL with drawing. Is there something that I'm missing in the code? The line doesn't show up on the screen. Thanks! glClearColor(1.0f, 1.0f, 1.0f, 1.0f); glBegin( GL_LINES ); glColor3f( 1.0f, 0.0f, 0.0f ); glVertex3f( 100.0f, 150.0f, 0.0f ); glVertex3f( … |
 | Hello, I'm trying to split a matrix (512x512) into blocks of (16x16).. Now I have managed to complete this for a small matrix (4x4) but when I try to implement it using the 512x512 it fails and doesn't produce enough blocks for the entire matrix. Here is the code on … |
| | Hey, I'm doing a project and on the last little piece. It involved taking 2 matrices, splitting them into blocks and then checking whether the blocks are simular or not. If the blocks wasn't simular, then swap them /or/ create a new Matrix that holds the values of the second … |
| | Hi there, I'm sorry if this is a vague question, but I've just been assigned to create a color animation project with GLSL, and I've never really used it before. The criteria for the assignment is that the animation should depend on object coordinates, vary over time and should use … |
| | Hello, I would like your opinion on my collision detection & jumping code. Is it efficient enough to be used in a full-blown game? Any ideas on how I could improve the efficiency of the code? Any bugs? Please reply with (constructive) criticism, comments & suggestions. Link: http://dl.dropbox.com/u/56274235/Working%20Collision%20Detection%20%26%20Jump.zip Thank you … |
| | Hello everyone..... The code bellow is a program that output single_sound with every Character printed on the output screen... #include<iostream> #include<string> #include<Windows.h> #include<mmSystem.h> using namespace std; int main() { system("color 0A"); string s="Welcome"; for( int i=0;i<=10;i++) { for ( int j=0; j<s.length(); j++) { for( int k=0; k<1; k++) { … |
| | Hello, I want my program to take input from a file rather than from keyboard and also output it to a file not screen. I tried writing prgram. This is what I wrote in visual studio... 1. #include<iostream> 2. #include<conio.h> 3. #include<stdio.h> 4. using namespace std; 5. void main() 6. … |
| | Hi everyone, im programing an agenda in c++ but im having a little trouble erasing an entry. Sorry the code is long, i was too lazy to use call functions... anyways bear with me. i tried setting the value to NULL on the entry i want to erase but that … |
| | Hello all. I am working with threads at the moment in my program. The thread is simple and looks like this. Thread oThread = gcnew Thread( new ThreadStart( this,&qualifiedlist::ThreadProc ) ); oThread->Start(); I have another simplar thread like this but its more complex. I try to set variables in it … |
 | Recentlt, I need to insert comment in my pf document, but I never try it and finds little information from the intenet, but I found that the PDF has the function of showing the comment and hiding the comemnt, so I try to convert a word document that contains comment …  |
| | #include<iostream> #include<conio.h> using namespace std ; int main (){ string name; cin>>name; cout<<name; cout<<endl; getch(); return 0;} //if u run the prog, and u enter ur first and last name after hitting enter it will show u the first name. My professor asked me to search why this is happening, … |
| | Hello, I'm new here and I could use some help please. Im trying to learn c++ with a book called Programming Principles and Practice Using C++. Im on Chapter 3 now, and so far not having to many problems. But i am stuck on one of the exercises at the … |
| | Recently, I meet a problem that I need to insert header and footer in excel with C#, I use the following code: Worksheet sheet = workbook.Worksheets[0]; sheet.PageSetup.FullHeaderString = "E-iceblue"; sheet.PageSetup.IsPrintHeadings = true; sheet.Visibility = WorksheetVisibility.Visible; sheet.PageSetup.LeftFooter = "everlasting"; But when I launch it, the header and footer do not appear … |
| | So I'm working on an assignment where we have to make a deck of cards using a Card class and a Deck class and when I try and test the constructor by testing the size i get this: Running 1 test*** glibc detected *** runner: free(): invalid pointer: 0x00902ff4 *** … |
| | Is there a way to create a dynamic array without necessarily knowing the size beforehand? I need to specifically use a dynamic array for a homework assignment, and I don't really want to ask the user how large the array should be (in this case, an array of chars i.e. … |
 | I want to find a range of values that a valid pointer cannot achieve, but can store. Basically this is my situation: typedef struct myNumberTAG { //stuff }*myNumberHANDLE; //A bunch of functions that work with myNumberHANDLEs: ///Not Shown //Some constants const myNumberHANDLE numberOne=0x1; const myNumberHANDLE numberTwo=0x2; const myNumberHANDLE numberInfinity=0x3; const … |
| | Hi there, I need to overload istream in this way: it needs to get string, then it has to parse this string and get number - can be longer than long long, and then save this number in another string, which I will give to class method. So far so … |
The End.