49,765 Topics
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 | Can anyone explain why the last line works? It seems like it is trying to cast a CRectangle as a CTriangle (which I imagine should fail?) but it outputs "5" as the function should. [code] // virtual members #include <iostream> using namespace std; class CPolygon { protected: int width, height; … |
| | Where can I find the best tutorial for teaching myself all there is to know about programming in C++? I have no money to spend on it and I am extremely new to programming (haven't written a program since BASIC, if you can count that). Any information you can provide …  |
| | error LNK2019: unresolved external symbol hi everybody i'm working under visualstudio2005 and i create a new namespase with some fonction ; after i have another class in a different file and when i call myfonction og my namespace i have this erreurs error LNK2019: unresolved external symbol "void __cdecl mynamespace::myfonction() … |
| | [ATTACH]17390[/ATTACH] I've no idea how to solve this Q with C. help me~~ plz~~!! |
| | Hi, How do I check if a member of a struct is null? I've tried: [CODE]if(ErrorInfo->TestName != NULL)[/CODE] The above method returns true even when [B]ErrorInfo->TestName[/B] contains nothing (debug shows it as 0xccccccc, ""). [CODE](!(strcspn(ErrorInfo->TestName, "") == 0))[/CODE] The above method throws an access violation. I've tried other ways too … |
| | Okay, I’ve got a noob question. It’s been awhile since I coded so I thought I’d start off at the beginning and create a template list and tree. Back in the old days I left the nodes open, but I wanted to keep the data private this time. My first … |
| | Hello, I am a newbie in C++ programming. I try to write a C++ program to first read and split a hugh text file (that containing multiple small files inside it) into multiple small text files, then I need to write the first line of each small text file into … |
| | [CODE=cpp]void BOARD_Unselect_All(System::Windows::Forms::Form^ Frm) { Frm.a1->BackgroundImage = Image::FromFile("elephant_pla.gif"); }[/CODE] a1 is a picturebox from the form. How do you use the buttons, picturebox, etc from the form being passed in? |
| | Hi, I am new to ACE. I want to use ACE library. I have seen so many codes. But if there is any document which explains elaborately about the macros then it will be useful. Like how to use ACE_DEBUG, ACE_ERROR. READ_MASK etc Please help |
| | [CODE]// #include <iostream> using namespace std; #include <cmath> #include <math.h> int main() { float a, b, c, t, s, area; cout << "Enter the lengths of your triangle's sides: "; cin >> a >> b >> c; if(a>b) {t=a; a=b; b=t;}; if(b>c) {t=b; b=c; c=t;}; if(a>b) {t=a; a=b; b=t;}; if((c*c) … |
| | Hi This is Singleton class program, please let me know any changes required in this code............... #include <iostream> using namespace std; class Singleton { private: static bool instanceFlag; static Singleton *single; Singleton() { //private constructor } public: static Singleton* getInstance(); void method(); ~Singleton() { instanceFlag = false; } }; bool … |
| | hello, i am a beginner to visual studio. i want to know how can i use pthread in visual studio 2008. am i supposed to download the dll? if yes, then after downloading how can i use that dll in my project. please help. Karishma. |
| | I need help...This is the class i am supposed to use... [CODE]#ifndef_MINESWEEPER_H #define_MINESWEEPER_H #include <iostream> #include <ctime> #include <cstdlib> using namespace std; const int SIZE = 3; class minesweeper { public: minesweeper(); minesweeper(int mines); void resetGame(); int flagCell(int x, int y); void unflagCell(int x, int y); int uncoverCell(int x, int … |
| | Hi everybody I defined an array pointer to hold a massive amount of data, (actually the RGB data of a screen with 1024*768 pixels). the data is assigned from another temporary array to the this array within a function that calculates the values of the temporary array and then assign … |
| | I have a problem with my console program. I have a text file named "myRecord.txt" with the following contents: 101,Carlito Caballero,500.00 102,Tina Gamboa,560.34 103,Angel Caballero,750.55 104,Kyla Shane,850.32 105,Jogie Glen Mait,1000.00 If I run the program, the console should prompt the user to enter the id number (which is the set … |
| | [I]<<edit: [URL="http://www.daniweb.com/forums/post191005.html#post191005"]split from here[/URL]>>[/I] Hi. My i ask something?,,can you help me please to solve this Problem? How Can i call Full Record using strtok and strcmp in text file Please!!!! [CODE]101, Carlito Caballero, 500.00 102, tina gamboa, 560.34 103, angel caballero,750.55 104, kyla shane, 850.32[/CODE] Here's the code [CODE]#include … |
| | I'm working on a prototype program for my class assignment. I didn't wanna jump into it quite yet until I understood how functions worked so I decided to make this. It's going pretty well and now what I'm trying to do is make it so the program takes user input … |
| | I am mostly familiar with C++. :?: Please help. Question is below : Write a program to discover how many numbers between 1 and 40 can be expressed as the sum of 4 positive squares (e.g. 15 = 12 + 12 + 22 + 32). |
| | hello everybody hi im a student of SGRRITS (my institute) in my inst we have turbo c++. is it a good platform for doing programming now a days and does any industry us it now a days. no.2: please can you suggest me its substitute which are better than it. … |
| | Hello. I am debugging a larger project and a tool called Crash Validator keeps pointing line 1 in my code extract:"inline bool SortKnownFiles2 (etc.)" in DirLoader.cpp Error message in Crash Validator is “Cannot create a file when that file already exists.” (in c++ it runs fine, except a few random … |
 | Is it possible to password protect a dll at compiletime. Please excuse my noobness, but let me explain what I mean. You app an runtine makes a lot of calls to a function in a library so it opens it and keeps it open for the duration your app is … |
| | Hello I'm looking to extract jpeg image data from a mjpeg stream, but I'm not sure how to do this in c++ . The code snippet below does the job of connecting to the remote ip camera server & receives the mjpeg stream via tempBuffer variable. [CODE] // Loop and … |
| | can I use fopen,and fwrite with ShellExecute? to take file in buffer,drop it in directory and run it with ShellExecute I did this way but I just get cmd window and file is corupted do I have to use some API to take file in buffer? |
| | I just started my mid level c++ class. In the past we have been using Visual Studio, which I can access thru a VM that our school supplies, so I can program from my Mac no problem. In this class, however, we are switching to a linux based programming tool, … |
| | [CODE]#include <iostream> #include <conio.h> using namespace std; main() { int a,b; b=50; cout<<"enter a value less than 50: "; cin>>a; do { cout<<"A number: "<<a<<endl; a++; Sleep(100); } while (a<=b); getch(); return 0; } [/CODE] |
| | I did'nt understand here in this code i was reading a book and then const char *q="Hello"; //string is fixed pointer is not *q='M'// error q="bye"; //works char * const t="Hello"; //string is fixed pointer is not *t='M'// works t="bye"; //error so my question is in first if string is …  |
| | Hello guys. How can i get my file path? I konw my program's name but i don't know where it will be put. How can i get file path during program's execution? Thank you  |
| | Hey guys, I have a question. I'm writing a script in c++ and want to have the script copy a file whose name was previously determined by the script to a output file who's name is determined through functions and procedures within the script. The whole script is looped until … |
 | Here is simple c++ program to demonstrate matrix rain. Compiler:TurboC |
| | Something that puzzles me in the following simple program: [CODE] #include <iostream> using namespace std; int main() { int row; cout << "enter row: "; cin >> row; int K[row], m[row][5]; cout << "Enter all the " << row << " K values:\n"; for (int i=0;i<row;i++) cin >> K[i]; cin.ignore(10,'\n'); … |
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