51,593 Topics
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| | Hi All, I'm trying to figure out how to load images from a resource file into a picture box using a visual studio windows forms application in c++. I figured out two different ways to do this in c# by going through the forums, but I cannot figure it out … |
| | Hello everyone I know that one cannot pass a parameter to destructor functions in classes. Is there a reason why this functionality was left out of c++, and is there a way to get around it? Thanks! |
| | I am trying to write a function which converts a number to a string. But when I return from the function, the reviving string - according to debug mode - still is empty, so the program outputs nothing. What am I doing wrong? [CODE=c] #include <iostream> #include <string> using namespace …  |
 | Say I have an array like this: double *a; and I use new/delete[] to do memory allocation on it. How would I be able to delete certain elements from it? Like this: [code=c++] void RemoveElement(double *a, const double &element) { } [/code] |
| | Hello, I'm writing a simple program implementing a list. You can add, remove, search, print and find the minimum element. My problem is that the program crashes if I don't add the 'system("PAUSE");' line before the last 'printf("Minimo = %d.\n", minimo(l));' call in the main method. Here is the code: … |
| | Hi there everybody, I am currently studying for my university exams and need 2 make a function for the below scenario. The function must display the information inside the 2D array as you can see in my code I have tried but to no prevail. Any help will be GREATLY … |
| | I am in a bit of trouble with this code it is due tomorrow need pointers the menu is displaying correctly but when i enter a number it locks up have i declared the switch statement wrong or is my menu declared incorrectly also in regards to case 4 it … |
| | i have this code here which inputs the numbers and then adds them. is there a cheats way i can change it so that it inputs the numbers then puts them into ascending order. [CODE]#include <iostream.h> void getNumber(int &, int); void sum( int, int &); void output(int[ ], int, int); … |
| | Hey guys, I am needing to detect when the last item in a listbox is selected. I first tried comparing the listbox.items.count with the listbox.selectedIndex, but unfortunately, whenever i load the items from a file to the listbox, there are 1 or two extra items at the end that are … |
| | I have NEVER had this experience before while coding my past assignments. For some reason, I keep getting this error that says [CODE]error LNK2019: unresolved external symbol _main referenced in function ___tmainCRTStartup[/CODE]. I looked it up on google and people have been saying it's because I should've created a windows … |
| | i'm just a newbie here in c# and still a lot more to learn, but i just want to know how can i convert into uppercase the first letter in a textbox inputted by the user if they input a lowercase letter. can somebody help me? please..just needed to complete …  |
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| | I am wanting to add the most simpelist count down timer available for Visual C++ with SDL. Does any one know of a good one i could try and use  |
| | [CODE]#include<iostream.h> #include<iomanip.h> using namespace std; float number1, number2, number3; void readThreeNumbers(number1, number2, number3); void sortThreeNumbers(number1, number2, number3); void displayNumbers(number1, number2, number3); int main () { readThreeNumbers(number1, number2, number3); sortThreeNumbers(number1, number2, number3); displayNumbers(number1, number2, number3); } void readThreeNumbers(number1, number2, number3) { cout << "Please enter three floating-point numbers, space between them: … |
| | I have a problem with strncpy. I need to change the first parameter to char for it to compile. I am not sure how I should do it. In C# I can just [CODE]int v1 = 123456; string v2 = ""; v2 = v1.ToString(); // in C# this turns the …  |
| | I've seen a few posts on here talking about "databases" as if they were just files and using fstream to manipulate the file pointer, etc. I'm familiar with SQL, so it would be nice to simply be able to execute sql command (as can be done from vb.net) such as: … |
| | i want to read the PDF text through c++ program ,give the solution.  |
| | Hi , i write this code and i get error whene i run it !!! why i cant send a variable to array parameter ??? [CODE]#include <iostream> #include <conio.h> using namespace std; void main(){ int a,b,c; cin>>a; cin>>b; c = a+b; int array[c]; cout<<c; _getch(); }[/CODE] i get this errors …  |
| | Hello there, I am trying to figure out the advantages of C++ STL containers over C. Correct me if I am wrong. a)in C++ containers classes are standardized. C doesn't have any standardized libraries for data structures beyond the native array type. b)each of these containers in C++ has member … |
| | i want the charcter i display in the grid to move upwards when i press 'w' & downwards when i press's' & right when in press'd' & left when i press 'a',,,,i have written a code that doesnt work can anyone help me to find out what is the wrong … |
| | I am writing a program for connect four I have all the code written and all works fine i was wondering however if anyone could offer any advice on a function to determine if a player has 4 or more in a row cause i just cant seem to think … |
| | I have two questions one is kind of a newbie question and the other one is a little more advanced. I have been coding C++ off and on for the past couple of years as a hobby and a little for my EE classes. I usually in my class reference … |
| | Hi all, I declared a vector of pointers in a header file named "bug.h" [CODE]#ifndef BUG_H #define BUG_H #include <vector> #include "board.h" #include "prey.h" class Bug: public Prey{ public: Bug(Board& boa); Bug(int x,int y,Board& boa); void breed(Board& boa); int getx(); int gety(); }; typedef Bug* Bugpt; std::vector <Bugpt> Bugarr(6); void … |
| | i am just learning C++ again after about 5 years of not learning it so i decided to use Visual C++ but learning is a bit hard at the moment, understanding everything and llearning to use everything anyway i need help or need to know why this code won't work … |
| | This class when, it is not integrated with the main program, shows the following error....and I have no idea what it is trying to say.. :( :( [code] #include "character.h" Character::Character(DrawEngine *de, int s_index, float x, float y, int lives, char up_key, char down_key, char left_key, char right_key) : Sprite(de, … |
| | Hi all. I had a software exam the other day and one of the questions was : Define a new data type called PC that contains data both about the computer and the monitor. The computer contains how much RAM (integer) and the processor speed (floating point number). The monitor … |
| | Hi, Let's say I have a csv file like such:- [b] part,text,true,quantity [/b] [code] [COLOR="Green"]371336959,-New DDM Part-,Y,1[/COLOR] 449127604,-New DDM Part-,Y,1 808635064,-New DDM Part-,Y,2 [COLOR="Red"]189657,-New DDM Part-,Y,2[/COLOR] 319330767,-New DDM Part-,Y,1 [COLOR="Green"]371336959,-New DDM Part-,Y,1[/COLOR] [COLOR="Red"]189657,-New DDM Part-,Y,1[/COLOR] [/code] Now I want to remove duplicate parts and add the quantities together whilst PRESERVING … |
| | Hi. I'm working on a binary tree home assignment and I have a problem. Initially my program used global variables. I decided to change that and declare variables inside functions (various reasons, you probably understand why). I want the program to run without using global variables. However, I can't figure … |
| | Hi, I have a form application that has a number of pictureboxes. As the program runs it changes the pictures in the boxes depending on buttons pressed on the form via a function 'updateGUI'. The program runs for a limited period and eventually i get an error: An unhandled exception … |
| | sir,can you pleaz tell me why reference over reference is not allowed? |
| | Dear all, I'm creating a set of functions to handle stl vectors. Some are useful for achieving my goals. I'm coding some other just for fun. But after some coding I see I cannot compile them propperly. One example would be a vector print function which prints all the elements … |
| | Im trying to make a program that generates all the verses of the song "The Twelve Days of Christmas" using recursion (its homework). Ive read what the book says several times, researched online, etc etc. Im not looking for anyone to do the homework for me...I just need some guidance. … |
| | [CODE]#include<iostream.h> //is used so it will display output to the user and that input can be read from the keyboard #include<iomanip.h> //is used so that the user can format input using namespace std; int main() { int qty1; cout << "Please enter the quantity of Televisions: "<<endl; cin >> qty1; … |
| | i'm making this spanish conjugator for class. and i cant seem to get how to make multiple letter variables. can anyone tell my what i'm doing wrong? it's kinda urgent. here is the code so far. #include <iostream> using namespace std; int main () { char verb; cout << "Enter … |
 | Hi guys: I wrote this simple code to read a series of numbers from a list and then do some simple aremathic with it. I am not certain where the error could be, I read the code upside down and still can understand where the error lies. Any help would … |
| | is there a way for me, using a mac to compile a c++ program to work on windows? or could some one with a windows computer compile this code and send it to me somehow?? #include <iostream> #include <string> using namespace std; int main () { char* verb = new … |
| | This is a silly question. I have been working with pointers for almost two quarters and this question never occurred to me until today when I wrote up some code and my IDE screamed at me about it. Oddly enough, 99% of the time I get it right so this … |
| | Goal is to create a simple class that can be used for GUI buttons. My question is how can I define a function variable, and then when constructing a 'button' define which function should be called when clicked. This obviously isn't right, but just to get the idea: [CODE] class … |
| | Hello everybody ! I want to write a program that reads from the user a number then prints it such in the Elevator if the input is 1, the output will be like that : * * * * * It seams to use an array 2D, how can I … |
| | HI i want find record in file and null it . i find it and set file pointer with --fsetpos--befor i use --fwrite-- . all thing id correct but record not change and fwrite write record at end of file i use ftell() and fseek() but i get again this … |
| | I'm working on a program that will get a list of words from the user and rearrange it in alphabetical order. So far it works but I think it may have some memory issues because I was testing an alternative way of asking the user how many arrays will be … |
| | I'm trying to write a simple file output program for my class. The error I recieve when I try to compile in VS .net 2003 is the following. [I]fatal error C1083: Cannot open include file: 'fstream.h': No such file or directory[/I] The code to my program is extremely straight forward … |
| | Okay, this just makes me feel stupid. I'm pretty good at programming for the console so I figured I would try a Win32 program. Apparently I'm stupid because I cannot even compile hello world. Heres the code I copy and pasted. [CODE] #include <windows.h> int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, … |
| | Heya Thanks for taking the time to look at this, i would like some people to review my curent project which is written in c++ using visual studio 2008. Although in VS08 it does not use anything that makes it dependant on it (i dont think) i just wanted to … |
| | I am trying to capture keystrokes, and have been able to for all letters, and numbers, but i cant capture keystrokes such as ' ;, @, -, _, +, =' e.t.c. I have tried looking up their decimal code from the ASCII table, but that does not work. In the …  |
| | Hey everybody, I am currently having difficulty using GetOpenFileName() and GetSaveFileName(). The keeps returning the error " undefined reference to `_GetOpenFileNameA@4' ". I can't seem to find a fault in my code, so is it the compiler or is it the code? I am using CodeBlocks. [CODE]void DoFileOpen(HWND hwnd) { … |
| | Hi, I am currently programming using c++ language and want to take advantage of some very useful wolfram mathematica functions : By that, i mean sending external datas or using symbolic calculus, applying required functions, and taking the result back in an array of my c++ program for example; I … |
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| | Hi, how can i save the text from a file in a 2d array? For example the file will be like: ebjevjhb tgbvtrjk trjgbj tgrrktgtr kgtrl tkltrg t feg ergfern gn sdcx xssw And i want to save this in a char 2d array like: char str[3][100] so str[0]="ebjevjhb tgbvtrjk … |
| | i have an assignment due for my c++ class where we have to input from the keyboard the quantity and input from the keyboard the stock price. so that it outputs as: Stock Item Quantity Unit Price Total Value ---------------------------------------------- Television 5 368.00 1840.00 Video Recorder 8 268.00 2144.00 Camera … |
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