51,593 Topics
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| | Hi All, Could anyone listdown the differences between pointer & reference??  |
| | I know I already posted this but I guess I cant do it the way it was shown. I want a 2-dim array to print out on the same line as string word. I cant seem to figure out how to get a 2-dim array to do this, does anyone … |
| | make a simple calculator involving the following operations addition, subtraction, multiplication, division, square-root, and percentage!! using c++ program..thankz!! :)  |
| | The following pertains to a Windows XP Embedded system running a single C++ application with administrator privileges. I need the application to read several bytes of data from the BIOS ROM. The data to be read will have been previously stored in the BIOS ROM at a known address when … |
 | Hello again! I am trying to make a jump and run game using SDL, but I am stuck at the jumping part. Whenever I press the Up key, the sprite should go up. However, when I press it, it goes down. I have changed it and done math that should … |
| | I want a 2-dim array to print out on the same line as string word. I cant seem to figure out how to get a 2-dim array to do this, does anyone know how to do this? [CODE]void Sort(string word[],float grades[][8], int number) { int i,j=o, temp; string aName; float …  |
| | Can any one guide me how can i write a byte array to a file.. I am using ofstream class function write().. but it only accepts char*, can any tell me some other function or any way of conversion..ma code is: [code]Byte array[512]; //....the array is initialized using memcpy()....// fstream … |
| | Having a hard time here, Im not great with pointers and arrays yet, can anyone tell me how to properly pass a char array, i thought this was right but the compiler is complaining with: I know the bubble sort is incomplete, i just wanted to quickly test the passing … |
| | Hi everyone, I have a opened and read a file in a program that I am working on. I have the following informantion in the file: string intstring intstring intstring intstring intstring int string intstring As you can see, starting with the second string, the string starts right next to … |
 | Hi guys, Could you tell me what's wrong with this code? I don't get why the compiler says it can't find a matching function... [code=cpp]#include <iostream> #include <vector> using namespace std; template <class T> int printVector(vector<T> &x){ for(unsigned int col = 0; col < x.size(); col++){ cout << x[col] << … |
| | guys! please help me to choose language (c++/J2ME) for mobile application! Actually I decided to do in c++ but some of my friends say it is not a good idea to do it! so please tell me which language I should select for S60 mobile phones to do project and …  |
| | b) Create a class called Company which contains a pointer called PtrArr which is used to point an array of employee objects and 1 integer data member. The integer data member will be used to store the number of existing employee currently. [make sure you have a proper constructors to …  |
| | Hi guys, I'm getting a segfault and I don't really understand why.. Here is the code n, i, quadcount, quadPerVert and quadindex are all (arrays of) unsigned integers. [code=cpp]unsigned int *quadsPerVert = new unsigned int[quadcount * 4]; //(...) vector<vector<unsigned int> > quadsPerVertIndex; quadsPerVertIndex.reserve(quadcount * 4); for (n = 0; n … |
 | I am making a blitting call on my backbuffer: [CODE=C++] BOOL drawImage(IMAGE *lpImage, LONG x, LONG y) { RECT rect; rect.left = x; rect.top = y; rect.right = x + lpImage->lWidth; rect.bottom = y + lpImage->lHeight; dwVideoErrCode = lpBack->Blt(&rect, lpImage->lpSurface, NULL, DDBLT_WAIT | DDBLT_KEYSRC, NULL); if(dwVideoErrCode != DD_OK) { MessageBox(NULL, … |
 | hello i hope you can help me :icon_question: i just want to know how to code binary value to decimal value using c++ im willing to wait for your response :) thanks a lot godspeed |
| | [ICODE] /* * Global Tech's employee system */ #include<iostream> using std::cout; using std::cin; using std::endl; #include "Person.h" int main(){ Person employee("Sue" , "Jones"); cout << "Employee Info " << employee.getFirstName() << " " << employee.getLastName() << endl; return 0; } /* * Person Class Definition */ #include <string> using std::string; … |
| | Hi everyone I'm having a problem trying to load a VBA program through C#. I'm creating an application in order to load Excel (so far so good), and I can even paste some information from one of my arrays in a spreadsheet.... My question is, how can I run a … |
| | Hi, I am trying to read the file (f1.txt) which contains : 3 0 -6 0 4 0 -8 0 ... I wish to read the first number from consecutive 2 lines and process them. Following is my code: std::vector<int> row; std::vector<std::vector<int> > two_node; int main() { string line1, line2; … |
| | Hi, sorry if this has been asked before I did a search but couldn't find it. How do I define a pointer to a 2D array? (I am trying to pass it into a function). Thanks. |
| | Ok I'm using the GCC compiler in C . I have a tree style of menu that has been designated function "Manager". I want to return to the top of the tree so basically what I do is at some point from within the "Manager" function I make the call … |
 | Hey, I'm learning Objective-C, and they use [ICODE]#import "File.h"[/ICODE] instead of [ICODE]#include "File.h"[/ICODE]. The tutorial I'm using says that import is like an include once thing, and it basically implements the #ifndef blocks that's normally done manually in C++. I was just wondering if this is something specific to Objective … |
| | Hello, I was just looking up the threads and I must say I saw a lot of codes with "std::string", "std::cout", etc... I just wanna ask, wouldn't it be better if you just wrote "using namespace std" instead ? I am doing it all the time, but if it's wrong …  |
 | Once the object is copied to the vector the pointer isn't updated. If I use a copy constructor to fix this problem I get awkward results. Could anyone please help me find a solution? Thanks in advance. [code=C++] #include <iostream> #include <vector> using namespace std; typedef struct { void *map; … |
| | I am using memcpy()function.. memcpy(&_bpb, bBootSector, 512); where _bpb is the variable of structure, bBootSector is byte array the whole progran works fine but at the exit it generates the following error: "[B]Run-Time Check Failure #2 - Stack around the variable '_bpb' was corrupted[/B]." Can any one please guide me … |
| | Hi, How to achieve hashing in C++? Can you explain this giving a small example? rgds  |
| | Hi, I've been looking around for how to execute another application from a c++ app. I remember in VB I could have my app launch the browser or other app and could even have it launch command line with the commands I wanted the system to run. I have found … |
 | I want integers 1-52 to be drawn only once, so every "card" will be seen and not one picked twice, heres the code [code] #include<iostream> #include<time.h> #include<string> #include<stdlib.h> using namespace std; class Player{ int hand; }; int main() { srand(time(NULL)); int deck=53; int *drawn; int notdraw[52]; for (int n=1;n<53;n++) { … |
 | Hey ppl, Im trying to solve some problems for topcoder website for practice purposes. But the compiler shows the following error for the codes i've been compiling. I have no problems compiling these codes with Borland C++. I've posted the errors and code below. Errors: Your code did not compile: … |
| | Hey ppl, I was browsing thro the topcoder sample problems and came up with this one. Plz suggest some good algorithm for this. Problem Statement Note: Please keep programs under 7000 characters in length. Thank you Class Name: SquareDigits Method Name: smallestResult Parameters: int Returns: int Define the function S(x) … |
| | Hi everybody, I want to declare a class having an object of another class as its member data. but I recevie compiler error: "No appropriate default constrctor available" my code samlpe is as follows: [code] class bigInt { bigInt(unsigned); bigInt(const bigInt &); unsigned *value } class RSA { RSA(unsigned); bigInt … |
| | I keep getting an error "cannot convert parameter 1 from 'char (*)[15]' to 'Student_Type *" in the swap call. gradclass is a struct and Student_Type is the name of the struct. Im trying to sort names with this. Anyone know how to fix this? [CODE=cplusplus]void SortNames(Student_Type* gradclass, int i) { … |
| | Hi I'm trying to use a vector to store function pointers, but when implemented in a class there method ceases to work. Class header: [CODE]std::vector<void (*)()> fns[/CODE] Class .cpp file: [CODE] fns.push_back(Search); fns.push_back(Print);[/CODE] Search() and Print() are (public) members of a class named Movie. This code is currently placed in … |
| | I'm a student working on STL containers which were not formally taught in class. The website I typically follow hasn't helped, and neither have my textbooks. I'm getting an assertion error with this "while" loop. Probably something obvious to someone who works with C++ STL... There's an explanation for all …  |
| | Hello again. I am currently using a base class for a certain type of object, which looks like this: [CODE=C++]#include <vector> template <class T> class CObject { public: inline virtual ~CObject () { } virtual std::vector<T> *Output (std::vector<int> *Input) = 0; };[/CODE] The problem, that arises from this contraption is, … |
| | I have the code runnig and it is all right. but within my loop I have it set from 0- 100 but my cout << only shows 59 - 100. I have tested the code with other numbers such as 20 -50 and 0 -38 .... and I see that … |
 | Hey, I'm just wanting to know how i can make some code so no random numbers are the same, I've got this so far to get the random numbers and display them but tried this and that and couldn't get it to work. [CODE=C++]#include <iostream> using namespace std; int main() … |
 | Hi Guys, i just wrote a program to print a sentence backwards using recursion. But i'm not too happy about it, if someone can give me a more optimized solution i'll be glad. You have to use std::string class. input: where the streets have no name output: name no have … |
 | Hello everyone! I am new to C++, and still haven't got to grips with objects, inheritance etc. etc. Anyway, here's the question - [CODE]class mainFrame : public Gtk::Window { private: library *m_library; player *m_player; }[/CODE] How can member m_player, when finished playing a track, access m_library to select the next … |
| | can anyone there help me about my problem in displaying a record of names,gender,annual salary and age..the inputs are the first name,lastname,gender,birthday and monthly income...i just have a hard time implementing it coz i have to use a string to deal with the name..how will i make it???just a hint.... |
| | [CODE=LANGUAGE]#include<iostream> using namespace std; class Nibble { private: union { int number : 4; }; public: Nibble(int=0); friend ostream& operator<<(ostream&,const Nibble&); friend istream& operator>>(istream&,Nibble&); }; inline Nibble::Nibble(int n) : number(n) { cout << "constructor.." << endl;} ostream& operator<<(ostream& nout,const Nibble& n) { return nout << n.number; } istream& operator>>(istream& nin,Nibble& …  |
| | Is there a way to save in a text based game through the MSDOS window? I want to be able to save the variables that store the mana, health, ect of a player.  |
| | I am using borland compiler... i need to define 4 gloabal arrays of double type that can store 5000 values like double d[5000],d2[5000],d3[5000],d4[5000].. and an array of objects of class data whose syntax is: [code]class data { public: int x,y; double s,w,e,d; }d[5000],f[5000];[/code] i am facing two errors: array size …  |
| | I am having a problem getting a certain part of my program to loop. I need the loop to repeat if 'Y' or 'y' is picked after a menu item is chosen. And if 'N' or "n" is picked print the receipt. I have tried numerous times to get the … |
| | I recently wrote a cpp file that I'm questioning. I'm unsure of whether the approach I took is correct or if it will cause damage to the heap. The goal of the project is to be able to do "clean-up" on dynamically allocated memory by storing the created object in … |
| | I need help on making a sine wave I'm trying to do the equation y = Acos(2 (pi)/B x - 2(pi)/B P) amplitude A, period B, and phase shift P. It is not working out too well so can anyone help me refine this? [code=c] #include <math.h> #include <stdio.h> #include … |
| | Hello all, I am not taking a class or asking for help with homework. I am attempting to learn C++ on my own and I do not understand the logic within one of the sample programs within my book. [code=Cpp] #include <iostream> #include <string> int main() { using namespace std; … |
 | Hi, I have a gizmo attached on serial port and need to detect changes of controls signals DSR, DTR etc. no data, just changes (edge). I do it with MSCOMM.ocx and it works, but only when is CPU on idle and windows messages are delivered on time. When is load … |
| | given x and y (the field dimensions) and x*y numbers, (pieces of cheese on each square) calculate the best way for the mouse to get from (1, 1) to (x, y), he has to get as many cheese as possible... also you can only move closer to the (x, y) … |
| | I am working on the code that reads an enum. It seems to point to an address instead Here is the code thanks for any help [code=cplusplus] ////////////////////////////////////////////////////////////////// //contribtor.h #ifndef CONTRIBUTOR_H #define CONTRIBUTOR_H #include <iostream> #include <string> using namespace std; //================================================================ //CONSTANT DEFINITIONS enum Gender {Male=0, Female, None}; class Contributor … |
| | The aim of the program which i am writing is to convert strings of DNA. The DNA is in a text file and represented by the letters A, T, C, and G. Reading in the file and outputting the converted DNA is easy. However i want to save the converted … |
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