49,766 Topics
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| | Well I have a question which could stem some confusion. I'm using C++ to develop some software which i will release as freeware on my website. I'm not new to database programming, however i have only ever worked with xbase and dbase... I would like to start making software with … |
| | [B]why is casting from a base class object to derived class object is unsafe?please explain with examples[/B]  |
| | Hi folks! Was wondering if you could help with a problem. I'm supposed to write a function that writes n, n-1, n-2, …, 3, 2, 1. I'm pretty sure I've got it but for some reason I keep getting 0 whenever I run it. It doesn't have to be a …  |
 | Hi guys, Could someone point me in the right direction, please? I'm trying to expand my system to accommodate the reservation of consecutive seat numbers. The user is prompted for a row number, seat number and then the amount of consecutive seats he would like to book. For example: The … |
| | Hi everyone.I've got a question on dynamic cast.Dynamic_cast allows us to downcast a data type from one to a more specific one in the same hierarchy. But why not declare the variable we need to the appropriate type during programming time rather than downcasting it at run time? I don't … |
| | I want programming network use language C++, I don't want use langage VC++ but I want use tool VC++. Can I do it? If language C++ do it, can you show me to do this ? I tryed search ebook for it in few weeks, but I can't search it. … |
| | Hi, I have problem putting a value to 16 bits variable. Here is, how I am doing it. [CODE]typedef unsigned int UINT; typedef UINT* ID_PTR; unsigned short int myclass[5]; const ID_PTR arr16_bit[5] = { (UINT*) &myclass[0], (UINT*) &myclass[1], (UINT*) &myclass[2], (UINT*) &myclass[3], }; [/CODE] Now accessing the myclass like this. … |
| | Hi, I created a few window forms and I faced problem when try to link them up. I am able to link up two window form but the problem comes when I tried to link up more than 1 window forms. For example when I want to link up the …  |
| | *EDIT* INTERPRET! lol....sorry! Write a recursive function array_sum(int *array, int size, int index) that computes the sum of all the elements of the array starting with position "index". Okay thats not too bad..but then he said this for example, if an array A holds the values 5,4,3,2,1 then the call … |
| | Hello i am using a public computer (im just starting out with c++) so i dont have the code on me but i have figured out how to create a text file. what i want to know is when i create it, it places it in the direcotry that my … |
| | The assignment is to, using the given header file, write an implementation file, a menu-driven test file, and a car wash simulator... [B][U]Please see attachment for complete instructions[/U][/B] This is what I have so far, I am having trouble with my print function... I am new to Queues and not … |
| | Basically I want to set up a 3-dimensional array, but I want to dynamically allocate memory for it. Say I read 3 variables from a file, all ints: f, s, and v. i want to allocate memory for array[f][s][v] array is part of a struct How would I go about … |
 | Hey guys i'm taking a c++ class and I know this is easy material but im not sure if a function call can have like m+n or FMAX and stuff. Any help with this would be great thanks. Determine which of the following function calls are invalid and explain why. … |
| | Hi I need help with the remove function in the AVL tree void remove( generic x ); Thank you guys |
| | I have written the code below to highlight words in quite large documents. Problem is: 1. It needs to be case insensitive, ie: "dog" or "Dog" should match "dog" 2. It currently matches words inside other words Can anyone help? Many thanks [CODE=cplusplus]void highlightTerms(vector<string> finalWords, string *source){ for (int i … |
| | Hello, I just downloaded the latest gd library, unziped it - i downloaded a dll version and a source code version. I have problems whit using it in my msvc application. I will paste here the install specifications for visual c++ users : [code] [I]Instructions from the gd site :[/I] … |
 | Hello! Is there any way that I could create a loop that will user the content from a text-file and the number of lines? I want to go through a file and look for something, and then I need to use line by line, not char by char. Maybe the …  |
| | Hey I'm new here to these forums and I'm in need of some help with my program. I'm supposed to write a program that will allow the user to enter up to 100 values into an array. The program will then count how many values were entered and display the …  |
 | Help please, just made this little program, no errors but it does not write any text for me on Dev-C++. [code]#include <iostream> using namespace std; int main() { system("title Array Program."); int myArray[5]; int loop; for (loop = 0; loop > 5; loop++) { cout << "Value for myArray[" << … |
| | I've recently made a pi calculator out of a pretty rediculous algorithm (which is incredible accurate by the way). Unfortunately, C++ doubles can only hold 16 digits of it! I know that's plenty enough for any practical applications, but I want more accuracy! (Call me insane). I'm just looking for … |
| | Hello! The text file is separated by tabs..I have used a struc as below: [CODE]struct scores { int maths int phy; int bio; int chem; int eng; int total; }; struct class { int class_id; char name[50]; }; ifstream fin; fin.open("marks.txt"); char buf[100]; string a; getline(fin,a); char delims[] = "\t"; … |
| | I was given this code by my professor [CODE] main.cpp #include "home.12.h" int main() { cout << mystery(30) << endl; return SUCCESS; } // end of main //========================================= functions.cpp #include "home.12.h" int search(int first, int last, int n){ int returnValue; cout << "Enter: first = " << first << " … |
| | I use the following code to read data from a txt file: File2Open = "data.dat"; if((In=fopen(File2Open,"rt")) == NULL) { Application->MessageBox("Open data file failed.", NULL, MB_OK); return; } handle = open(File2Open, O_RDONLY); do { Readin1; Readin2; }while(!eof(handle)); Readin1 and Readin2 are two subroutines and consist of many lines of fscanf(In,"%s",&TTT) to …  |
| | Hi, at the moment i have a program that examines a file, does some processing and then outputs the results in a file. Is it posible to examinemultiple files stored in a folder all at once, then output the report files in a seperate folder without having to run my … |
| | Hi everone, Today i have a question has two parts and i did what i undrstood.If threr are mistakes ,please tell me. The Question is: [quote]father decided to buy a new vehicle. He paid 20,000 QR in cash and the rest will be paid on settlements as follows: 1500 … |
| | Does anyone know the size of an enum? If i have [CODE]enum foo { YES, NO, MAYBE };[/CODE] is that 1 byte, but if i had 10 enumerations would that be 2 bytes, and so on? Thanks. |
 | I have 2 classes, Edge and Point. Edge contains Point P1 and Point P2 as private memebers. Edge has accessor functions [code] Point getP1() { return P1; } [/code] and the same for P2. Point has << overloaded - [code] ostream & operator << (ostream &output, Point &p); [/code] I … |
| | Hi What are the basic differences between the methods atol() and strtol()? Regards, Amit |
| | Hi, I recently has a C++ code which only run on Fedora Platform. I wanted to run debugging on these code as I came across some unexplainable scenario output. Can anyone suggest how could I use any debugger? I tried to use GNU GDB but then the code I am … |
| | Hi! Sorry, I couldn't find close topic. But maybe somebody can help me with my problem? I create a Word document, and I don't know how to paste the values of my variables in the document. For example, if i have the variable - int sum = 20, how can … |
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