51,593 Topics
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| | What is the correct way to declare a multidimensional array. I tried like this [CODE]unsigned char** intext=new unsigned char*[16];[/CODE] but i get a bad_ptr. |
| | Hi, I´m having problem while converting char to string. [code=c] #include "stdafx.h" #include <fstream> #include <cstdio> #include <iostream> int main() { std::ifstream arquivo("entrada.txt"); if (!arquivo) { std::cout << "Arquivo não encontrado" << std::endl<< std::endl; system("PAUSE"); exit(0); } std::string token; char arquivo_linha[255]; while(arquivo) { arquivo.getline(arquivo_linha,255); if (arquivo_linha[0] != 35) { token … |
| | I´m using Visual C++ Studio and when I include another .cpp file it doesn´t takes all the what have been included before. Here is an example: main.cpp [code=c] #include <iostream> #include <string> #include <sstream> #include "readtext.cpp" int main() { teste(); return 0; } //readtext.cpp void text() { printf("teste"); } [/code] …  |
| | Can anyone tell me what GUI to use? And is there a GUI similar or same like standard library? Thanks in advance.  |
| | Well, I wonder HOW to make an explode() function from PHP in C++ For those who don't know. explode($separator, $string) breaks given $string through given $separator for example: [code] $string = "Hello world!"; $result = explode(" ", $string); echo $result[0]; //IT will give us HELLO word echo $result[1]; //IT will … |
 | Im working on a program to get single characters from a string and i guess im doing it wrong but i was using strok() to tokenize the string in the hopes that it would do so but anyway this is what ive got so far and before you ask its …  |
| | Hi, I have to calculate the exponetial of a large (on the order of 10^5) negative number. I tried using exp(), the exponential function from the cmath library, but I get an answer of 0. So, I tried to use the power series for the exponential function. For numbers from …  |
| | I please want to ask if anybody knows how to install allegro without use of terminal.. |
| | Hi everybody . i have a problem that i have been trying to solve for weeks can u help. this is bonus problem given to me by my professor in college. hers is the description: menu driven library: 1. list books 2. add books 3. find books a. by id … |
 | i need some help: i have something like: word1:word2:word3:word4 ...read from a file,how can i do,when i read this line,each word delimit by ":" to put into a string.... string str1,str2,str3,str4; str1 = word1; ........... str4 = word4; sorry for my english i hope eu understand  |
| | Ok, I am about 20+ hours into this utterly confusing idea of link lists. The classes I have are listed below. I cannot for the life of me understand how I would write a reverse function. My office floor is cluttered with printouts and scribbles from trying to make this … |
| | No programs are running.Both is Visual Studio and Codeblocks... both are showing the following error, [B]LINK : fatal error LNK1104: cannot open file 'kernel32.lib'[/B] I have google it, some say setting environment to "C:\Program Files\Microsoft SDKs\Windows\v5.0" or reinstalling visual studio, or editing registry key "HKEY_CURRENT_USER\SOFTWARE\Microsoft\MicrosoftSDKs\Windows\CurrentInstallFolder"(i didn't find any MicrosoftSDKs under … |
| | Why is the constructor called from top to bottom rather than bottom to top ???? |
| | I read that the initialisation of the vptr is done by the default constructor automatically . What happens when u provide implementation for the default constructor . Is the initialisation code added automatically ??? |
| | I have a file over 100 Kb long. I want to perform operations on successive batches of 256 characters. [CODE] int fs=0; char ss[32556]; ifstream nm,nm1; nm1.open("as86.txt"); if(nm1.is_open()) { nm1.seekg(0, ios::end ); fs = nm1.tellg(); } nm1.close(); nm.open("as86.txt"); nm.read(ss,fs+1); nm.close(); cout << endl << fs << endl; ofstream mn; mn.open("as86.txt"); … |
| | I know this gets asked a lot but i want to make a program that sends me some form of an alert at a certain time of day. I am using windows 1. i want it too run invisibly so no windows, doesn't show in task bar, or task manger … |
| | hey please can anybody guide me how we can take input from the command prompt as we do in C++ and Java. I can take input using .dat files but I want the user to give input in the command prompt. I will be very thankful. |
| | Hello, yesterday, a friend of mine who develops in all kinds of languages but mostly VisualBasic.NET, told me he only listens to the regular kind of pop and rock, and sometimes to heavy metal kind of things. But -he told me- when he had something to do in C-style code …  |
| | Hello, For a exercise I have to make a programm where several student puts thier home-grades in and thier names. here's the code [code] #include <string> #include <vector> #include <iostream> using namespace std ; int main() { vector<string> names ; typedef vector<double>::size_type siz_tp ; siz_tp aantal ; vector<double> numbers; typedef … |
| | So close (I think)! I've been working on this for some time now (on and off, coming back to it) and now I'm stuck. Hopefully there's not to much wrong with the coding of it, the compiler throws up lines 50 & 63 with errors? Not to sure if I've … |
| | Hi I am trying to create a tester to check a server-client application assignment. When I try to run the server in the background I can not properly start clients - one different terminals I do manage. I am looking for a mechansim to automatically create a server and a … |
| | Hi guys, I'm currently trying to produce a facial detection application, but I seem to have some problems. My program, is able to recognise multiple users, and match their captured image to one saved in the database. However, if a person who has not registered is photographed, it is supposed … |
| | [CODE=C] #include <math.h> void greedyMatch() { Xnode *u; Ynode *v; arc *e; forallXNodes(u,G) { assert(!u->isMatched()); forallOutArcs(e,u) { #ifdef STATS stats.searchArcCnt++; #endif v = e->head(); if (!v->isMatched()) { #ifdef STATS stats.mVal++; stats.greedCnt++; stats.flowArcCnt++; #endif v->match(u); u->match(v); break; } } } } void augment(Ynode *last) { Ynode *v, *v1; Xnode *w; arc … |
| | I am interested in using DirectX to make games. I'm using MinGW, which is a windows command line port of GCC. How would I get it so that DirectX 10 is included in the files? It probably is in the headers, but I don't know which to include because most … |
| | I am new to C++ in terms of large projects distributed over various source files. When I compile(gcc compiler) I get the following error: undefined reference to 'C::C()' I have this code: [B]/src/lib/abstract/[/B]A.cpp [CODE] #include "src/plugins/geo/C.h" #include "B.h" class A:public B { public; A() { B m_b; } void speed() … |
| | ...well i would like to practice c++ by analyzing the logic of the sample programs.... ..thank you for your help.. i really appreciate it... |
| | Hey there, I am attempting to open Firefox using C++ on Linux (Ubuntu). However, I get an segmentation fault. What am I doing wrong, and what should I do? [CODE]std::cout << system("/usr/bin/firefox") << std::endl;[/CODE] /usr/bin/firefox works in commandline and when I run this program in debug mode in Netbeans, firefox … |
 | I'm writing a small game engine and I have a little problem. The code below shows the exact situation: Header1.h [CODE] #ifndef _HEADER1 #define _HEADER1 #include "Header2.h" namespace HNamespace { class HClass1 { public: HClass1() { } ~HClass1() { } HClass2 * A; }; } #endif [/CODE] Header2.h [CODE] #ifndef … |
| | I am wondering if somebody could recommend a good book and/or tutorial for an absolute beginner with no previous programming experience. Thanks. Also If I can do decent at programming, I may end up going to college in order to try and make programming a possible career |
| | Hello! I'm new to c++ but I have a problem and desparate for help. I'm trying to store string and integers into a file, but only strings get stored and integers dont. I tried casting,didnt work. Not to convolute you with my code, I came up with this small program … |
| | Hi guys, Shortly my research group will be getting a big fancy set of CAEN VME nuclear instrumentation modules. It will be my job to write some C/C++ programs to control all of these modules. That's about as far as I understand. I'm a C++ baby (I know some Java, … |
| | Hey all I have seen a lot of stuff about palindrome checkers so I thought I would write one that works for STL containers as well as arrays. it accepts a bidirectional iterator to the first element and an bidirectional iterator to 1 after the last element. Included is a … |
| | Hi guys, I would like to execute something like this in my program: system("C:\test\perl\a.pl"); But the problem is i need to execute: perl a.pl Can't just execute the a.pl and expect it to run. Any ideas on how i could simply open up the cmd prompt with my program and … |
| | I have a vector class that is defined using a template. VS 2010 is underlining every instance of these templates, claiming that the identifier Scalar is undefined. Peculiarly, these errors only occur in the definition of the class I will list first but not the one that inherits it. Here … |
| | I would like my C program to run my perl script: I have something like this in mind: system("C:\test\perl\a.pl"); But obviously it needs to do perl a.pl. Not just execute the a.pl. Any ideas? Something simple would be appreciated. |
| | I am having a Visual C++ Debug Assertion Failure. It is happening after the internet opens and then try to go to website thats not the homepage. here is the info in the message: Program: C:/Program Files/Internet Explorer/IExplore.EXE Files:dbgheap.c Line:1132 Expression:_CrtIsValidHeapPointer(pUserData) |
| | I'm new to c++ however, I have been doing C for about a year now so OPP and all its related things are new to me ( classes etc. ), i have the program in C so I'm trying to find a better way to implement it... Thanks in advance … |
| | I'm trying to use .open() but I'm having an issue with my arguments to this function. Here's my code: [CODE] vector<string> FDT_filename; ifstream is; is.open (FDT_filename[0], ios::binary );[/CODE] Which results in the following error: [CODE] ../sim_main.cpp:297: error: no matching function for call to ‘std::basic_ofstream<char, std::char_traits<char> >::open(std::basic_string<char, std::char_traits<char>, std::allocator<char> >&, const … |
 | How would you take an int and make each diget into a array element? For example: [CODE]int num = 12345; int nums[4]; // how ever you enter numbers into the array // would result in: // nums[0] = 1 // nums[1] = 2 // and so on...[/CODE] |
 | In a nutshell I am trying to write a program that will connect to a database, query several tables for various sets of data that will then be transformed into XML that is stored into a file on the local hard disk. My first thought process to solve this problem … |
| | I am trying to use the CalcOpticalFlowBM function but I don't understand hot it works. I want to find a motion vector for every blocks but I don't understand that the CalcOpticalFlowBM yields velX and velY. I wrote below code . [CODE]/* Create an object that decodes the input video … |
| | I have a Report Model List Controller and I want to get Selected Row Of data to be used.. my Row has there are four data colums.. Name.Age,Birth and Salary... please help me to solve this... thanks...  |
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| | i need help converting this C++ to pseudocode help me pleasee [CODE]#include <iostream> using namespace std; { string Z[]={"zero","one","two","three","four","five","six","seven","eight","nine","ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen"; string A[]={"zero","ten","twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety"; int N,N1,N2,N3, r; string text; N1=N/100; r=(N-(N1*100)); if (r<20){ cout<< Z[N1]+"hundred and"+A[r]; } else{ N2=(N-N1*100)/10; N2=r/10; N3(r-(N2*10)); cout<<[N1]+"hundred and"+A[N2]+[N3]; } cin>>N; return 0; }[/CODE] |
| | pls guide me which language will be easy for this java php or c++ |
| | I think this is an easy question but I don't know the answer to it. How does one link the value of an argument to a function and the functions parameters? For instance: [CODE]int a; int b; void fn(int &c, int &d) { c++; d++; } int main() { fn(a,b); … |
 | Hello, This is probably trivial, but I can't find a solution to the following problem. In C++Builder 2007 I was able to write different strings both to the Application's Title and to the Main Form's Caption. In the Title I displayed the name of the Application; in the Caption (showing … |
| | Say i have a 256 byte file. How many additions or multiplications can a modern computer perform on them using c++ ? I've been working on this c++ compression project that does a lot of calculations. I use Dev-cpp,and am a amateur programmer,i've not used pointers,vectors or anything fancy yet,anyway … |
| | Please check the below code template<class T> class Row { public: Row(int cols=0):row(NULL) {SetRowSize(cols);} ~Row() {SetRowSize(0); } Row(const Row &r):row(NULL) { SetRowSize(r.numCols); for (int i=0;i<numCols;i++) row[i]=r.row[i]; } void SetRowSize(int n) { if(row) delete[] row; if (n>0) { row=new T[n]; memset(row,0,sizeof(T)*n/sizeof(char)); } else row=NULL; numCols=n; } int size() { return numCols;} … |
| | How can I manage to lock or unlock access db query table. e.g. I have a game which displays few questions and then answers which are taken fromt the access db records. What I want is during the game play, it should remain lock till it is accesed, so that … |
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