51,593 Topics
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| | Hi! I'm trying to find min variance (both value [U]and[/U] index). I have x# of product defects tracked over y# of days. prod1 prod2 prod3... Day1: 1 1 1 Day2: 1 2 2 I have arrays that store max & min defects, by product#. minVar = maxDefect[]-minDefect[] gives me the … |
| | Here is my initial code. It is linking, but giving me an error code that I can't comprehend. I have to basically write a program to do the following: In main declare a Player Name array and a score array. Declare the size of the arrays to be 100. In …  |
| | This was part of a questionnaire. I have no idea what they are asking... my closest guess is float rational please help! thank you. |
| | I made a simple color finding game. the problem is that my color input guess is not good so complex I want them in one line and also I want to see my tries at certain places. can you help me thanks in advance. [CODE]#include <cstdlib> #include <iostream> #include <string> … |
| | I have written the program below to calculate Standard deviation and mean of a given file of data. If I run it gives the wrong answers. Can someone help me go along? #include <cstdlib> #include <iostream> #include <cmath> #include <fstream> using namespace std; class Statistics{ double x; int n; double … |
 | [code] void* thread(void* arg) { std::cout << "Hi" << std::endl; return arg; } void clientFunc(TCPSocket* s) { pthread_t pid; pthread_create(&pid, NULL, &thread, NULL); pthread_join(pid, NULL); } int main() { ServerSocket s(4543); try { while(1) { clientFunc(s.accept()); } }catch(Error& err) { err.what(); } } [/code] My question is, how can I …  |
| | here is my code [code=c++] int main() { int i; char * cstr; char * p; string *userInput; int sizeOfArray; cin >> sizeOfArray; add(i,userInput,sizeOfArray); system("PAUSE"); } void add(int i, string *userInput, int sizeOfArray) { string Input; char * cstr; char * p; userInput = new string [sizeOfArray]; for(i= 0; i< … |
 | hi Using while, write a program that keeps reading integers from user until he enters -1 then prints the average of all entered numbers (-1 should be ignored). this is my solution, but i dont know why he gives me wrong average? [CODE]#include<iostream> using namespace std; void main() { double …  |
| | Someone Please help with this. I want to make a class Statistics and read from an external file and find the mean and standard deviation and below is what i have so far. any suggestions? [code] #include <cstdlib> #include <iostream> #include <cmath> #include <fstream> using namespace std; class Statistics{ double … |
| | Palindrome detector. Palindrome is any word/sentence/phrase that reads the same foreword and back. I'm in the middle of creating a program that accepts a sentence, phrase, or word. Then checks to see if it's a palindrome, I'm just having trouble on what to pass to my function. The function must … |
| | Hello everybody! I'm trying to understand following code. [CODE] #include "stdafx.h" #include <iostream> using namespace std; class Circle; class Square; class Triangle; class Shape { public: virtual bool Check(const Shape&)const = 0; virtual bool Check(const Circle&)const = 0; virtual bool Check(const Square&)const = 0; virtual bool Check(const Triangle&)const = 0; … |
| | Hello all, I've recently been asked to demonstrate the difference between Turbo C++ 3.0 and Visual C++ 2008. I'm not really familiar with the current coding standards, so I've enclosed a sample of Turbo C++ code. Please point out which functions are deprecated as well as their replacements. [CODE="C++"]#include <iostream.h> … |
| | I have a dialog-based application that just has a big edit box. I want to make a quotation mark bold right when it is typed. How can this be done? I am using dev-c++ 4.9.9.2 (I don't know how to make single characters bold, let alone how to capture the … |
| | Can anyone tell me how to find the maximum value for a specific variable(i.e int, long long int, double)? Also is there a way to set a variable to this value(without knowing it and typing it in)? Using Dev C++. Any help appreciated.:) |
 | Hi Friends, I am new to C++ wxwidgets world . I plan to study same, I am basically from web programming but I like to study this new technology come in C++(I am newbie there too!). I have 2 types of C++ distributions installed in my PC with Windows XP …  |
| | Dear All , I need your support to convert the below C++ 6 lines code to C# or vb.net . this function calculates the checksum for a given text. GUCHAR GenerateCkSum(GUCHAR *pure_data, U2 size) { GUCHAR chksum; I2 i; chksum = pure_data[0]; for(i=1; i<size ; i++) chksum ^= pure_data[i]; return … |
| | Hi I'm New Here. Although I have been reading in the past and appreciate all the help that the board has given me already. I have a homework assignment that I need the user to enter how many names they want to enter, then enter that number of names, display … |
| | hello, I want to write 2 programs with C , one work on Robot1, the other work on Robot2. So I want the program to send a signal from Robot1 via Bluetooth to Robot2 and Robot2 handles and accepts this signal (message)and reply to Robot1. how to code this? please … |
| | Hi.. I don't know how to do the draw condition & error checking on the following tic tac toe codes, can anyone help me to complete this with elaborations and explanations please.. thanks #include<iostream> using namespace std; char box[9]={'1','2','3','4','5','6','7','8','9'}; void drawboard() { cout<< box[0]<<" | "<<box[1]<<" | "<<box[2]<<endl; cout<< "---------"<<endl; … |
| | hello guys... when we press F12 in visual studion envirnoment, it takes us to the definition of the function (and Shift+F12 to declaration) but what is the hotkey for going back where we were (I mean back to the usage of function where we pressed F12)?? thnx |
 | Hi, I have been working on a way to reverse bitwise Xand with c++. I have managed to do most of it but can anybody tweak this script I made so it works to its full potential. At the moment this script tries to return the variable x from ((12 … |
| | [code=c++]void getCommands(char * cstr,char * p,string *userInput,string Input) { string currentCommand = ""; strcpy (cstr, userInput.c_str()); p = strtok (cstr," "); while (p!=NULL) { p=strtok(NULL," "); cout << p; } [/code] ERROR `c_str' has not been declared request for member of non-aggregate type before '(' token I have #include <cstring> …  |
| | hello guys...Due to some reasons I need to pass a variable's address to MeessageBox(). I am using a function which returns a pointer to the item selected from combo box. Now I want to show this item's name in the MesageBox(). How can I do that? thnx`````` |
| | I need help writing an anagram that test 2 strings. [COLOR="red"]os[/COLOR]: microsoft [COLOR="red"]compiler[/COLOR]: visual studio Here are some of the directions: Read the first string, then write a loop that uses an array of 26 ints to count how many times each letter has been seen. Read the second string, … |
| | I'm trying to say this: [CODE] string songLocation = "data/sounds/blabla.wav"; PlaySound(songLocation,NULL,SND_FILENAME|SND_ASYNC);[/CODE] but here is the error I get: [CODE]cannot convert `std::string' to `const CHAR*' for argument `1' to `BOOL PlaySoundA(const CHAR*, void*, DWORD)' [/CODE] Does anyone have any ideas? (btw, songLocation cannot be changed from a string. If that happens … |
| | Hello people, Quick question. I am working on a mouse maze project, and I need help reading the maze into a dynamically created multi-dimensional array, called "maze". I have already implemented a working code as long as the type of "maze" is char. Below is the code for that: [CODE]bool … |
| | I'll try to keep this short. I'm writing a 2D platforming engine and I had good collision detection, but I had to add a separate condition for every platform I had. Essentially the collision function compares the sides of 2 rects. Here is a code snippet of the for loop … |
| | I've got a chunk of code that opens up a txt file with 5 or 6 lines inside. I only need to grab the first line of the txt file and put it inside of a variable. The problem is that when I use this code, instead of grabbing the …  |
| | Can you please suggest an algorithm that uses pointers and I also have to read and save the text file, which I#m having trouble with. Here is a rough translation of the task into English(I used google translator so it's bit jumbled, my german's not that good): Define a structure … |
| | [CODE]void DeleteMovie(vector<Movie> &M1){ cout << "Option selected: delete a movie from the database" << endl; string T1; int TT=0; if(M1.size()<1){ cout << ">Error: There are no movies to delete.<" << endl; } else{ cin.ignore(100,'\n'); cout << "Enter the title of the movie you want deleted: "; getline(cin,T1); for(int i=0;i<M1.size()+1;i++){ if(M1[i].Get_Title()==T1){ … |
| | I'm having trouble with vectors. I have a class that I read from a file, then I insert it into a vector. It should work fine, but my compiler crashes every time. Am I not using the vector correctly? [CODE]#include <iostream> #include <string> #include <iomanip> #include <fstream> #include <sstream> #include … |
| | Hi,everyone! I have to write a program that can find zip codes. I have to read the codes from a txt. file, so i have to use struct arrays In the main program, I just have to enter any random zip code and the program should be able to tell … |
| | i have a problem getting it to display the average score of the players entered and also the player names and their scores for those that scored below the average. it works other than that. its late, ive been at this and another program for hours im probably not thinking … |
| | Hi guys I got a generic question (looking for a generic answer): I have to load a DLL into C++, I've been playing around all day with it trying to access the methods (I have a big manual for the DLL), so far I have tried the next: 1.- #import … |
| | I would first like to start this post with a sincere Thank you to everyone who has posted and will post help for my problem. Without you guys, I would be banging my head on my desk. Well, I got another problem. This time with a function that takes a … |
| | Hi, I'm creating an rts game. I'm looking for a way to store unit data. I thought, I'll make a struct for all the required data, and make a multidemensional array of them (one dimension is the different players, the other is the units). The length in both direction is … |
| | this is my header file.. sorted_list.h class sorted_list { private: class list_link { private: int key; // identifies the data double value; // the data stored class list_link* next; // a pointer to the next data public: list_link(int,double,list_link*); ~list_link(); }; class list_link* first; public: sorted_list(); ~sorted_list(); void insert(int key, double … |
| | Not sure why I am getting it, I got this one other time and forgot how i fixed it.... Getting it when i am calling my functions in the main file (3rd) Three files to this code: [CODE]namespace SALES { const int QUARTERS = 4; struct Sales { double sales[QUARTERS]; … |
| | [code] void* thread(void* sockArg) { TCPSocket* s = (TCPSocket*)sockArg; s->showUser(); return sockArg; } int main() { ServerSocket serversocket(4543); try { while(1) { TCPSocket* socket = serversocket.accept(); pthread_t pid; pthread_create(&pid, NULL, &thread, socket); pthread_join(pid, NULL); } }catch(Error& err) { err.what(); } } [/code] Why doesnt my s->showUser(); gets called ?  |
| | can anybody tell what's wrong with this code! //=========================================================================== // hybrid.cpp --this file implement the hybridlist class // Time-stamp: <2010-10-29 18:52:46 Dnambembe> // To compile: // g++ hybrid.cpp // Copyright (c) 2010 by Domingos Nambembe. All rights reserved. //=========================================================================== #include<iostream> #include<cstddef> //need NULL #include"hybrid.h" using namespace std; typedef NodeType* NodePtr; … |
| | I am new to conneting to MYSQL through a C++ code; so this is what i did i installed MySQL Server 5.1 (it was a EXE), and thats it. i opened the MYSql command line client and created a DB, and added a table and values to it. This is …  |
| | Hey guys, I have a really simple question that I doubt you'll find any trouble answering. Does any of you guys know where I can learn C++? What's the best website you know, and thank you. |
| | hi can you tell me what type of data i should use to store a very large number like 500! (factorial of 500) thanks |
| | Write a program which initializes two vectors, one of type integer, the other of string. Populate the string type vector with five strings (‘one’, ‘two’, ... ‘five’). Populate the integer vector with [ 5 4 3 2 1 1 2 3 4 5 ]. Write a function that empties the … |
| | well here is my problem i had a task to transfrom sequence of decimals entered by user to binary so i did it but here comes my problem it turn out that i MUST have used at least 2 functions 1 main for input output and 1 which contains the … |
 | I know many will start with ODBC, but slow down ;) I have searched for ODBC and all I find is UnixODBC. Is this the same as ODBC? Also how stable it is? I will be happy to know some apps/companies behind it! I need support for MySQL, PostGreSQL, DB2, … |
| | I am just learning how to work with multiple files instead of putting all my code in 1. When I have the delete lines that are marked it seems to crash the program. I must be over looking something simple here on why it is crashing. [CODE]// golf.cpp -- Definitions … |
| | I am using Micosoft Visual Studios 2010 and reached a chapter in my book that asks for seperate compiliation. Up until now I have been using Notepad++ to write my code into a .cpp file and then used Visual Studio Command Prompt with a 'cl' command to compile the code. … |
| | Like the title says, I'm having issues creating a tooltip for one of my controls in my dialog. This is what I have: [CODE] HWND CreateToolTip(int toolID, HWND hDlg, PTSTR pszText) { if (!toolID || !hDlg || !pszText) { return FALSE; } // Get the window of the tool. HWND … |
 | I'm working on a project that utilizes producers and consumers for an operating systems class. Each producer and each consumer will be its own thread. The producers will generate records that will be stored in a global buffer, in which the consumer will then access to use the data. I … |
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