51,593 Topics
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| | Hey, Im trying to write a program that using gauss-jordan elimination to solve a set of linear equations.It reads in two files names for matrix A and C. I have to first form an augmentes matrix (A|C) and then do the elimination.Can any one help me by telling how to … |
| | Hey guys, I have created the following code and I can not figure out how to do one thing, add users. I can do it manually, but I need to prompt the user for two new accounts and then add them to the list. Can someone please inform me of …  |
| | Hello all, I am at the beginning of a new program working with structs and I am getting an error I cannot figure out. My code so far is [CODE]//PJ901 PAtrick Nealey //Acme Payroll Program #include <iostream> #include <fstream> #include <iomanip> #include <cstring> // for _strcmp using namespace std; const …  |
| | Hi, is there a way to send an integer array with WriteFile to RS232? Seems like I have a data type conversion problem. I would like to do something like this: [CODE]unsigned int buf[3]={1,16,3}; DWORD written= 0; if(isOpen()) { WriteFile(m_hPort, buf, sizeof(buf), &written, NULL); }[/CODE] Thanks in advance!  |
| | So, in the course of trying to write my own matrix-class (as an exercise, if nothing else), I ran across the following problem, exemplified in a dummy class: [CODE]class dummy { public: int a; int b; dummy(int a, int b): a(a), b(b) {}; dummy& operator=(dummy &rhs) { a=rhs.a; b=rhs.b; return … |
 | Hey guys, i have this project that, when i compile, 11 of the header files cannot be opened. I have no clue why - i've never seen this type of error. The project is much to large to copy/paste here, but does anyone have an idea of what would cause … |
| | Hello all, I am writing a function to download a HTML page from another server. I am wiring this code using MFC's Casyncsocket Basically, this class runs the callback function (onReceive) whenever it detected some new that can be received. Originally, I had something like this: [CODE] void CLASSNAME::OnReceive(int nErrorCode) … |
| | Help me please. I don't know where the error is. If you find it i will appreciate it. Very much. It says its inhere somewhere : [CODE] else (ENEMIES > ADVENTURERS) { cout << "\nAlong the way a band of Ogres ambushed the party. "; cout << "All fought bravely … |
| | Hi guys, I'm really sorry to bother you with a simple question. I'm doing an assignment with operator overloading at the moment & seem to not understand how operator+ should be used in regards to my program. I understand the point of it & how to get it when using … |
| | This is my assignment for my CS class. I got the assignment but I have no clue how to do it. can anyone explain it to me? thx a lot!  |
| | Hello. Please I need help from anyone who know about my problem.. I m passing value to textBox. I need to get that value and pass to CAN. I store val as: String^ myval=textBox1->Text; and i m passing to CAN as: Transmit.Data[0] = myval; but i m getting error. please …  |
| | I am in a basic programming class and am having difficulty figuring out how to account for a non-numeric value being placed in for a binary number that will be converted to decimal form. If there is to be say a P typed into the binary input number, I want … |
| | [CODE] #include <iostream> #include <cstring> #include <string> #include <cstdlib> #include <iomanip> #include <stdlib.h> #include <conio.h> #include <stdio.h> using namespace std; class Fraction { private: double numerator; double denominator; public: Fraction (); // Fraction (double numerator, double denominator); //Fraction (Fraction &); //double operatorMultiply (fraction a, fraction b); //double operatorSum (); //double … |
 | hey guys im new to recursion to recursion..pls look at the function call ...question is how do i call in two functions at the same time..and which one should i return thank you. [CODE]#include <iostream> using namespace std; bool canMakeChange(int total, int nums[], int length){ if(total==0) return true; else canMakeChange(total,nums,length-1); … |
| | Hello everyone im currently making a library, and im new to using arrays, i have added some books to my library file using an array. i was wondering how would i go back and select the element in the file to delete. the area that im trying to code for … |
| | I'm completely new to C++ and trying to figure this stuff out I had posted a topic a couple days ago. After many frustrations and headaches, I deiced to start over. This is what I got: [code] #include<iostream> #include<iomanip> using namespace std; double ot = 0; double getHoursWorked(); double getPayRate(); … |
| | Hey. I was wondering if anyone here could help me with a little problem I'm having. I'm trying to create a "source-to-source" compiler, but I really can't figure it out. Everyone has told me to "Use Yacc/Lex " (or various variants of them), but I really don't understand how they're … |
| | write a program that reads in a list of names and stores them in [I]vector<person>. [/I]Then ask the name of the best friend for each person in the list. For each best friend, locate the Person object matching the best friend and call a [I]setBestFriend(Person* newBestFriend) [/I]memeber function to update … |
| | HI, I have one application which is created by Visual C++ Professional edition with using of MFC header and I have one DLL, where is every useful functions. It is possible, taht some data from DLL can be saved in SrnTerm in this command? Because function to read data from … |
| | [CODE] #include <cstdlib> #include <iostream> #include <cmath> #define width 5 using namespace std; void SelectionSort(double array[][5], int height); int main() { int height; int i,j,lab,midterm,final,number; float avglab,avgmid,avgfinal,totallab,totalmid,totalfinal; cout<<"Number of students: "; cin>>height; cout<<"\n"; double array[height][5]; for(i=0;i<height;i++) { cout<<"Please enter student number: "; cin>>number; array[i][0]=number; } cout<<"\n"; cout<<"Please enter Lab scores.\n"; … |
| | Hi there, I write a code using socket to realize multiple message exchanges between a client and a server (i.e., a protocol running between A and B). But when I use recv() on a client to receive a message from a server, it turned out that the returned receive size … |
 | Hello again, hope you guys can help me again ^^ Will make text red where need help. Sry its long... Ok, so(sorry if some things are in a diffirent language in there), the assigment is: to make a program using a Horoscope structure [CODE]struct Horoscops{ string name; int dzim[2]; string … |
| | Ok I've posted a couple of posts before regarding OpenGL stuff, but I realized I'll be better off learning c++ first (yeah!). So I started reading through some tutorials and already got the hang of if statements, variables, funcitons, and loops. So I decided that I could make a little … |
| | i need a program that works with windows vista, i have visual studio 6.0 and it doesnt work,, can any one help me plzz |
| | hi all. im sorry if i ask a newbie question, but i really newbie in c++ honestly. i got this error when i try to build solution. i dont know what files i must show to you, but i want to show 3 files. precompiled.h halls_of_lightning.h boss_loken.cpp precompiled.h [CODE=h]#ifndef SC_PRECOMPILED_H …  |
| | hello, i am student and i want to know more abour binary expression tree...i hav idea about creating binary search tree ....bt v r suposed to create binary expression tree....e.g..for a+b....+ (infix/prefix/postfix) / \ a b will u plz help me how to proceed?? |
| | Hey I need help with the math tutor. I need to be able to print out if the answer is right or not . Also let the user enter the number of math problems per set and what the max number will be for the set. If you could please … |
| | Hey folks, I'm writing a class called Set that can put in objects (ints, chars, whatever) into a dynamically allocated array. I'm having issues with two functions, union() (which concatenates two arrays of the Set class) and intersection() (which puts two arrays together of the Set class at a point … |
| | The program imitates a gambling card game. The program shows you three cards, then the program interchange them, and if you can guess correctly where a particular card is, you win. Here is some sample interaction with the program: Card 1 is the 7 of clubs Card 2 is the …  |
| | Hi I am having issues populating a vector using "new" where nodeVec is a vector where each entry consists of another vector with 3 elements. zMap is the vector I am trying to populate with the sum of the squares of the first two elements for each entry in nodeVec. … |
| | When i try it goes heywire and gives me 35 errors. all for the erase command. :( [CODE] for(int i=0; i<populationsize_; i++) { //check for black for(int j=answer_->front(); j!=answer_->back(); j++) { if(answer_[j]==population_[i][j]) { feedback_[i][j].push_back("Match"); for(int k=tempanswer_->at(i).front(); k!=tempanswer_->at(i).back(); k++) { //find first instance if(tempanswer_[i][k]==answer_[j]) { tempanswer_[i].erase(k); break; } } } } … |
| | I have a problem with accessing iterator to the vector in following code (just a few important lines): [CODE]class Data { ... vector<double> hodnoty; public: int CompareData(vector<Senzory*> data); ... } class Senzory : Data { ... const vector<double> &GetData(void){return hodnoty;}; //Returns reference to the vector hodnoty ... } int Data::CompareData(vector<Senzory*> … |
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| | Hey, I have to code a min-heap, along with other things to help compute minimum spanning tree. I coded up the min-heap pretty easily and I have no compile errors, however my delete fix up does not seem to be working properly. For example, I insert these ints into an … |
| | Using visual studio 2008 I created a small vc++ project and ran it using the exe created. The problem is the exe runs fine on my PC. But when I tried to run the exe on an another PC it gave the error "The application has failed to start because … |
| | Hey guys, I am working on creating a dynamic queue and I am having some problems. I got my code wrote to set up the actual code but I am unsure how to put my information in and print it. I need to enter the following information in my queue … |
| | Hi guys i need help in algarithm code. thanks Remove All Occurrences For this problem please start with the code provided in file list_reversal.cpp. Add a new function to this code. The function should take two parameters: a list head and an integer. The function should remove all elements of … |
| | This is a blackjack program using array. It works in Devc++ but doesn't work in visual C++.I think I am missing some kind of header files could anyone help me out? my email is .... thanks [code] #include <iostream> #include <ctime> #include<iomanip> #include <string> using namespace std; void deal(int,int&,int& ,int[][2],int&,int[][2] … |
| | Can anybody help me understand how this design pattern works? I'm supposed to make a program that will create a tree using pointers or an array. The client is then supposed to choose which of the two types of trees he wants to use... I've created the tree with pointers, … |
| | write a programme that creates a two dimentional array initialised with test data. use 4 rows and 5 columndatatype. the programme should have the following functions: 1.getTotal:- this function should accept a two dimentional array as its argument and return the total of all the values in the array 2. … |
 | Hey all. I don't have any experience with vectors so I'm looking for a little guidance. I don't want the answer, just a direction to take. I've looked up vectors on cplusplus.com but I couldn't understand exactly how they work in order to code them into my program. Here's my … |
| | Hello, I wonder if it is possible to have opacity on a textBox control. What I initially is trying to do is that I have a multilined textBox where a lot of text is written and behind this textBox there is a panel with an backgroundimage that I would like … |
| | I wrote a program which creates an n-ary tree using the left child right sibling approach. Each node of the tree is labeled by a dynamically allocated array of ints. I am currently having a problem where if I am searching for a node labeled 1 2 3 4 5, … |
| | I have to write a template function that tells me if two binary trees are equal in structure and in data. However whenever i call the function in my testing code, it tells me I have an undefined reference to it. I'm not sure what this means or how to … |
| | Hey guys, I'm looking to add on to a recent program of mine that uses classes. My next step is to add in a working overloaded equality function in order to compare the gross pay of two Employees within the class. Now, I've read up on this quite a bit … |
| | Hi, I am trying to create an automated trading system and am fetching data from an API (interactive brokers) API. I need to store 30 nodes of tick data( Tick is a reference type struct I have created) and store it in a linked list. When i start the system, … |
| | Writing a function to search an array for a value and return the index if found. in finding what the size of the array is for use in the while loop condition i found that here inside the templated function sizeof(data) comes back as 4(it should be 40) but when … |
| | Can anyone tell me why setprecision is causing this error at runtime: terminate called after throwing an instance of 'std::bad_alloc' what(): std::bad_alloc Aborted The program ran fine; after I added << setprecision(2) << to a series of output, I received the error when trying to run the program. I have … |
 | Is it possible to create a piece of code that can learn? like a robot? e.g if it see's a picture of me, the code will learn and understand that the picture is me every time it see's it?? |
 | I'm having a bit of a problem using enum variables. The program below compiles just fine, but the output program at the end is blank. Any hints? [CODE]// Program Reformat reads characters from file DataIn and // writes them to DataOut with the following changes: // all letters are converted … |
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