51,593 Topics
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| | Ok so when makeing my program these errors come up: Error:jump to case lable Error: crosses initialization of 'std::ofstream a_file' The ofstream one repeats twice referring to the same line. Can anyone help me. I can't post the code as this is from my iPod.  |
| | How much longer until I'm the king of typos and stupid questions? Ok well in a different thread of mine there was a reference to BIOS.h. Does anyone know where to download it (If I don't have it comp making tarball sooo slow) or/and what's in it. I want to … |
| | i am planning to start learning how to use threads. my question is: should i first learn windows.h's functions for threading before boost to get the pattern or should i jump right to the boost threads? ps: sry if i posted in the wrong section |
| | hey alll..I posted earlier on needing help for a code on input #..base..print decimal form..I actually didnt learn this in high school so thats why I was having so much trouble :@ Now that I read up and understand the logic in bases..I was thinking that for my code I … |
| | Hi! I don't understand why I can't use my functions declared like this: [CODE]#include "groundArray.h" int groundArray::getlistX(int i) { return x; } int groundArray::getlistY(int i) { int groundlistY[] = {100, 100, 100, 100, 100, 100, 100, 100, 100, 100, 100}; return groundlistY[i]; } int groundArray::getlistWidth(int i) { int groundlistWidht[] = … |
 | It's my first time to use functor. So hope can get some guide here. My program need to call different function depend on input. so i thinking to use functor to do that. e.g. main.cpp [CODE]#include "functor.h" #include <cstdlib> #include <iostream> using namespace std; int main(int argc, char *argv[]) { …  |
| | Hi All, I want to trap inRange and outRange event of the bluetooth device i.e. paired with my windows7 machine. Thanks in advance. |
| | Hi, I'm a beginning C++ student and have an assignment to dynamically create an array of a struct to store students' first names, last names, and test grade scores, and then pass it via pointer to a function that will sort the grades and names in ascending order. I wrote … |
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| | Hi I have a code as follow: [CODE] template<class T> inline bool IsValidUnsignedLong(T n) { return (T)(unsigned long) n == n; } [/CODE] When I pass -l to that function, it returns TRUE which it shouldn't since its not unsigned. Can anyone explain to me the reason behind this? why …  |
 | I've been looking and I'm a bit lost about how to change the target of ostream so that I could write to other buffers than the console. |
| | I've managed to use classes in separate files before, but I can't seem to get it to work here. I was just programming some very basic classes for a simple game I wanted to make. Here is the main.cpp file: [code]#include <iostream> #include "energySystem.h" #include "healthSystem.h" #include "intelligenceSystem.h" using namespace … |
| | In writing a logfile program, I need a function to output the log entries between two dates. I use [ICODE]seekg()[/ICODE] and [ICODE]tellg()[/ICODE] to save the position of the first entry to output and last entry and then go back later to output the data in between. However, [ICODE]seekg()[/ICODE] when told … |
| | Ok how do I make a C++ console app format a floppy disk for a Win or Linux Computer? I really want it to be auto-matic like without the whole volume tilte, filesystem; that sutff. PS How would I setup virtual memory in linux? Thanks answer the floppy question first. …  |
| | My program is in an infinite loop, when It hits the "Bye" part in the code it goes right back up to the top. Help with this. It's a pretty simple program so I can't see what I did wrong. [CODE]#include <iostream> #include <windows.h> using namespace std; int main () … |
| | Hey, I have a set of types which are all arithmetic (have operators for addition, subtraction, multiplication, etc.). I want to aggregate any number of them into a single object, so I'm using the std::tuple class template and the <tuple> library (and Boost.Tuple for backward compatibility). My question is a … |
| | [CODE] boost::shared_ptr<resource> resource_ptr; boost::mutex resource_mutex; void test() { if(!resource_ptr) //#1 { boost::lock_guard<boost::mutex> lk(resource_mutex); if(!resource_ptr) //#2 { resource_ptr.reset(new resource); //#3 } } resource_ptr->do_something(); } int main() { boost::thread t1(test); boost::thread t2(test); t1.join(); t2.join(): return 0; } [/CODE] According to the text book, this kind of codes may cause race condition, but … |
| | Ok so i have trouble with looping with while and for statments heres the questions: 1. Write a program that gets a positive integer from the user and prints all the numbers from one to that integer. If the inputted number is zero or negative, then the program will print …  |
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| | i have a code written in c++/Cli (CLR Console app) that uses .Net framework. it basically uploads a file to a ftp server. i wanna run it on computers that dont have .net framework. and are running windows xp or windows 7. can i somehow convert it into win32 console …  |
| | Hi, I am trying to a play a .wav file in a C++ program. I think my code is OK, but when it plays, it plays the default windows 'error' sound, not my .wav file. This is the program: [code] #include <iostream> #include <windows.h> #include <mmsystem.h> #pragma comment(lib,"Winmm.lib") using namespace … |
| | friends i m using vc++ 6.0 and oracle 10g version.i created mfc file and connected database. i done insert and delete operation.but i cant check or view the data(table).can you any one tell how to do? and any other option 2 view the database thanking you |
| | Well im having this problem on how to add large integers. I have used strings to take in a very large number something that can work on as many digits as you need it to. I take in 2 strings for the numbers you want to add. After which I … |
| | Hi, I am almost done with C++ and my project is on Resistors. The problem is that when i try to tun the program, line 37 and 34 has an error saying "no match operator". It is the same as line 28 and 31. Then when I make line 34 … |
| | What I would like is when I input the file path in the console window (lets say C:\hello.txt), I would like it to create, open, then write text into the file. Here's an example of my code. [CODE]#include <iostream> #include <fstream> #include <string> using namespace std; int main () { … |
| | I am trying to learn c++ from a textbook (as so many others) but am having a really hard time following this example: Write a program to input and display a sales file. Each input line contains an integer ID number and a sales amount. When the end of the …  |
| | What does it mean if there is an ampersand right before the function name? Something like: int& myFunction(int& a, int& b) Also my book said something about how it doesn't create a copy of something if you pass it by reference, but what exactly does that mean? I never understood … |
| | Working with dll i got into a situation where loading a dll can cause security threat. lets say for example when you load a DLL, it gets same access privilege as the calling process. So if calling process is running with Admin privilege the loaded dll gets the elevated privilege … |
 | I am still having major trouble with my openGL model program. The big issue is that I cannot figure out how to debug it since I am saving the important data to the graphics chip using vertex buffer objects (VBOs) so at least as far as I can tell, I … |
| | there are 2 common ways to loop through a vector 1: [CODE] vector<int> myvec; // let's assume it's initialized for(int i = 0; i != myvec.size( ); i++) { // code // access by 'myvec[i]' } [/CODE] 2: [CODE] vector<int> myvec; // let's assume it's initialized for(vector<int> :: iterator i … |
| | Can someone help me on how to handle an exception (warning) box in my C++ application? When I run my application in launches an exception box (warning in particular) with two buttons "Break" and "Continue". When I click the continue button the application then runs successfully without errors. What I …  |
| | Hello all, This is my first post here. I've exhausted every resource I can think of in hopes of figuring out what I'm doing wrong, but I can't seem to get it right. I'm doing a homework assignment where I have to solve the 8puzzle problem using BFS, DFS, Iterative … |
| | can someone show me how to prompt user to input a number from 0-35 and if the number is less than or equal to 9 it will display the number but if it is greater than nine it will store it as A=10, B=11, C=12...... By using the cast operator … |
| | I am not sure why but this code (an attampt at a point and click game engine using Allegro 5) throws up an unhandled exception. The program starts and displays a picture, but as soon as the mouse is moved the exception pops up and the program crashes. I have … |
| | Hi all, How to find the offset of a structure member just by knowing the structure name and the address of that member????? For ex. [CODE]Struct cook { int a; int b; char c; }eat; void func(int *ptr) { //how to find the base address of structure. //I know only …  |
| | basically i have a header full of function prototypes(util.h) and a cpp file with the functions body [CODE] // util.h #include <ctime> uint32_t GetTime( ); uint32_t GetTicks( ); // util.cpp #include <util.h> uint32_t GetTime( ) { return GetTicks( ) / 1000; } uint32_t GetTicks( ) { return clock( ); } … |
| | [CODE] #include <iostream> #include <string> using namespace std; int getNumAccidents(string); void findLowest(int, int, int, int, int); int main() { int counter, num, crash1, crash2, crash3, crash4, crash5; string n = "North", s = "South", w = "West", e = "East", c = "Central"; for (counter = 0; counter < 5; … |
| | friends i am using visual c++ 6.0.i need to use multiple cpp files and that cpp file to be communicate.can you tell any one how to do??? thanks for the helping |
| | Hello, There are many tutortial about it, but all are olds or are for C.. if someone know any FRIENDLY site/forum/pdf to learn c++ please give it, for my c++ window programming is like chines, because there is no any help like in VB/C#/F#/Java and things work totaly diferent, example... …  |
| | Hi all, How to find the base address of a structure ,just by knowing the name of the structure and a address of one of its members. Thanks in advance |
| | Hello people! Got a project due tomorrow been at it the whole day still no luck hopping one of you guys could help me out before tomorrow :/ First one...... This is the code [CODE]int main() { const double Tax = 0.0825, Rate = 0.15; int PartNum, Units; double Price, …  |
| | heyy all :)) So im working on a new piece of code here..take into consideration that I love while loops and that's what I really want to use! so here is how the program would go read: # then read: base print: decimal representation thanksss :)) |
| | What I want is when I type "calc;" (without quotes), The calculator opens. Else, if I didn't type it correctly (example: "calc" (without quotes)) it will generate an error. [CODE]#include <iostream> #include <string> using namespace std; int main () { string calc; char end; end = ';'; cin >> calc … |
| | Hi, how do I exactly do this? [quote]1) Read an integer from the input. (Reading will automatically stop after the first non-digit character, accounting for possible sign characters.) 2) DO read the next character WHILE the read character is whitespace, then validate it as an operator and store it. 3) … |
| | [CODE] Rectangle::Rectangle() {length = width = 1.0;} Rectangle::Rectangle(double len) {setLength(len);} {setWidth(1.0);} Rectangle::Rectangle(double len, double wid) {setLength(len);} {setWidth(wid);} [/CODE] I get this error: Error 1 error C2447: '{' : missing function header (old-style formal list?) H:\C++\Programming assignment one\Programming assignment one\programming assignment 1 member functions.cpp 19 on line 5 and 9 and … |
| | Hello, first this is not a homework assignment so please respond whenever you have time as a speedy solution is not exactly needed. I have been learning C# recently from a microsoft book and had an idea of a program i want to make. Basically i want to be able … |
| | I havent programmed in C++ for about 3 years.. Since i started uni actually.. Now i gotta implement some stuff for Algorithms and Complexity.. I've got a vague idea of how to do that but thats not my problem.. According to my memory and old programs that i dug up … |
| | Can anyone list the pices of hardware I can manipulate with C++ and code with it \ ex: #include <windows.h> Beep(250,250) for internal sepeaker. Thanks in advance |
| | Hi! I'm running the latest OpenSuse 11.4. I have knowledge of C++ programming and I think I'm ready to start using graphics. I have downloaded [URL="http://sourceforge.net/projects/alleg/files/allegro/5.0.4/allegro-5.0.4.tar.gz/download"]allegro-5.0.4.tar.gz[/URL], extracted it and tried to include allegro.h file in my C++ code. Here is my testing file for allegro. [CODE]#include <iostream> #include "/Documents/Allegro/include/allegro5/allegro.h" int … |
| | I am writing a program for an assignment, i have a main that calls a test and the test simply tests all the functions within a class called int11, the int11 class and implementation are as follows [ICODE] #ifndef INT11_H #define INT11_H #include "proj1.h" class Int11 { private: T _left; … |
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