51,593 Topics
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| | Hi, As we know constructor doesn't have any return value so it is not good idea to perform exceptional handling inside constructor.SO i would like to know if i am opening a file inside constructor and due to some reason (file not exist) failure happened inside constructor then how to … |
| | In turbo c++,how can i copy a certain file from one drive to the other e.g,the file is located in G:\one ,i want to copy it to C:\tc the file name is "file.txt"...Much love |
 | I'm working on a project for a tic tac toe game. I'm working on this with a partner (assigned) but he has kind of fallen by the wayside. Here is the assignment: Filenames: ttt.h, ttt.cpp, tttmain.cpp Your second project will be completed with a partner. For this project, you will …  |
 | Hello. I have a few Qs about Hash tables. how does `std::hash` return a `std::size_t`? for example how does it convert a `std::string("Hello")` to `std::size_t`? How do these functions work? i have no idea what's `hash_combine` and `seed` do in `hashval.hpp` This is from STL 2nd edition. hashval.hpp #include <functional> … |
| | Hello I am tring to write a code to generate random numbers into an array, I don't understand why this isn't working. please help #include <iostream> #include <ctime> #include <cstdlib> const int NRows = 5; const int Ncols = 5; using namespace std; int main() { //declare variables int num[NRows][Ncols]; … |
 | title says all.......! oid diamond(int n); // where n is the number of stars in the middle row what it shows me |
| | void diamond(int n); // where n is the number of stars in the middle row. You can assume that n is odd. (You can change the prototype of the function diamond) |
| | please give me some[Click Here](http://www.facebook.com) # student #  |
 | With regard to C++ books, I'll just echo the advice here .The following books are recommended; read them in mostly the order listed." Accelerated C++ " Andrew Koenig & Barbara Moo " The C++ Standard Library " Nicolai Josuttis --- a "must have" " Effective C++ ", " More Effective …  |
| | Hi is possible to cast List of objects to List of string array?  |
 | Quite a while ago, I made [URL="http://www.daniweb.com/code/snippet217147.html"][B]this[/B][/URL] snippet. This code is basically the same, except that it adds animation. This method of blitting is very fast assuming you don't use a surface that's too large. On a 500 x 500 surface, I managed 350fps using only 0-1% of the cpu. … |
| | Does C++ have predefined text constants / string constant to be used as replacements for digits when testing errorcodes ? An example: if (errcode == 17){ std::cout << "The file already exists!" << std::endl; } To make it more readable I can write: if (errcode == FILE_ALREADY_EXISTS){ std::cout << "File … |
| | # What's the problem in output where the algorithm was correct ???? # #include<iostream> #include<stdio.h> using namespace std; main() { int LA[100],K=1,N=5,L;//K=POSITION...N=element for(int i=0;i<=4;i++) { cin>>LA[i]; } L=LA[K]; for(int J=K ; J<N-1; J++) { LA[J]=LA[J+1]; } cout<<"DELETE ITEM:"; N=N-1; for(int P=0;P<=4;P++) { cout<<" "<<LA[P]; } } |
| | I am using following C++ code to enter a value of X which is used to print out variable CDF. This C++ code is expected to give very similar value we get from NORMDIST function in excel. However I get following error in debugger with out getting any output in … |
 | i have these function for create the tooltip: HWND CreateToolTip(HWND hwndTool, string text) { /*INITCOMMONCONTROLSEX icc; icc.dwSize = sizeof(INITCOMMONCONTROLSEX); icc.dwICC = ICC_BAR_CLASSES | ICC_TAB_CLASSES | ICC_WIN95_CLASSES; InitCommonControlsEx(&icc);*/ if (text=="") { return FALSE; } // Get the window of the tool. //HWND hwndTool = GetDlgItem(hDlg, toolID); // Create the tooltip. g_hInst … |
| | i did several ways and nothing work correctly. i have 2 controls: 1 - label: with an animation; 2 - the tooltip is showed on top until the label is re-painted. so is there another way for put the control, always, on top? |
| | see my property constructor: template <typename T> class property { private: T PropertyValue; std::function<T(void)> getf; std::function<void(T)> setf; public: property(const T &value) { getf=nullptr; setf=nullptr; PropertyValue=value; } property(const property &value) : PropertyValue(value.PropertyValue) , getf(value.getf) { } property(std::function<T(void)> GetFunction=nullptr,std::function<void(T)> SetFunction=nullptr) { setf=SetFunction; getf=GetFunction; } inside a class i have 2 functions: void … |
| | I want to read data into an array from a data file. Because I do not know, ahead of time, how much data is contained within the file I need to declare the array at run time using new. My current strategy is the read through the data file to … |
| | i need some help to input some prompting in a ready programm written by someone else for a school,thoughht all night,giving me no errors but the out put is not what i need |
 | I'm reading the book 'C++ Without Fear 2nd Edu' and I'm a little confused on the subject of shallow copies. The book says the problems can arise if you make a shallow copy of an object and something happens to the original, goes out of scope, is deleted, etc... I …  |
| | **Question-1: Write a program to sort in ascending order random entered numbers by user using Linked Lists. - Size of LL is not limited - Entering numbers should be stopped by entering '0' (zero) - Sort entered numbers using any sorting algorithm (Bubble, Selection or Insertion sort) - Display sorted … |
| | Problem Statement: NAtural DIAlogue team at Orange labs has an abbreviation "Nadia Team". This abbreviation causes a big problem for them in Egypt as a lot of Egyptians think this team is owned by a female called nadia and they don't know they are working on NAtural DIAlogue. To solve … |
| | I need to find out the output of the following code snippet return by function go(2) ... int a=10; int go(int b) { if(b<=4) return b; else return go(b+1)*go(b-2)-(b*2); ++a; cout<<a; return -1; } When I do the dryrun myself on paper , it should first return the value of … |
| | Hi! I have an assignment. A C++ program. But sad to say I dont know how. -Write a program that multiplies two numbers withou using (*symbol). (Use for loops) Please help me! |
| | I want to ask how to pass the '30','31','32' to SQL WHERE IN clause For example EXEC SQL DECLARE abcd CURSOR FOR SELECT Consignment FROM Transaction WHERE order_type IN (:dest) where dest will hold the value '30','31','32'. I have tried as above example but it is not working SQL did … |
| | My dears , I have a opengl c++ program that works fine in the vs2013 and draws tree. Now I want to use that program in the qt gui open gl project. I know how to make gui program and add classes and headers. But I do not know how … |
| | hi!im new in c++ i need help how to make a software that convert any number that the user will enter and convert it in any base that the user will enter. It will convert it and show the result.  |
 | Hello all! When would it be advisable to use string iterators vs the "for char c in string" loop that is a feature in C++-11 or vs the for (int i.....) loop? And why? The only two situations I see myself using string iterators is for the STL algorithms and … |
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| | An electricity board charges the following rates to domestic users to discourage large consumption of energy: Unit used (u) Residential rate Commercial rate 0 < units <= 100 6 8 100 < units <= 200 8 13 200 < units <= 400 12 17 500 < units <= 800 17 …  |
| | Hello, so this user input all in one line string , i need to parse the input into two categories: user age and user name. for example , the user input -->> [23:Frank] [15:Jack] [45:] [33:sofia] [] in this case i have more than one argument (delimiter, total of 3 … |
| | Good evening to all. I have a question related to programming contest between countries or universities and so on. Does anyone know the best programming book for olympic contests for C++ programmers ? Best Regards |
| | **Student and Courses Record Management System (LinkList of LinkList)** In this Assignment you need to create a small student and courses record management system with following functionalities. 1- Add New Student This function will allow you to add a new student record,you can use any three attributes of your choice … |
| | i try to compile this programme and thasn't work :p i think that the problem come from the string fonction (int r=strcmp( CL[j].nomC , cl);) #include <stdio.h> #include <conio.h> #include <string.h> struct etudiant{ char nom[7]; char prenom[7]; float not1; float not2; float not3; float moy; }; /*struct branche{ char nom[10]; … |
| | Hi community, I want to prevent user input character in Edit Control on a dialog. I think i need to catch WM_Char to prevent showing the character, but i do not know how to do it. Thanks for your help.  |
| | Hi everyone, I’m beginner and I need a little help. I have to make RPN (postfix) calculator using stack which is implemented by singly linked list in C. Now I found that but in C++ and I’m having trouble translating it to C. Can you help me getting things to …  |
 | I have some source code done back when time first started and long before unicoding of a old gaming/chat system used mostly in 90s knowing to millons of young gamers as mplayer.com now questions I have is the server side was coded for Solaris Sparc/Intel server core using Sun workshop … |
| | Hi everyone, My program is crashing on taking input of alpha-numeric and store it in char[]. I don't know why, please anyone help ! sample input : C9H8O4MgOH #include <iostream> #include <string.h> using namespace std; bool hydroxide(char[]); int main() { char formula[] = ""; cout<<"Enter chemical formula : "; cin …  |
 | Hello dear members, i am looking for a solution for my problem: -I want to write .ini values (xor-ed) -Then i want to read the .ini (un-xor) -Finally i want to be able to access the values Example : [test] boom = 1 haha = 23446453 text = ADSdsajew I … |
| | Write a C program to input an integer, and output how many times each digit occurs in the integer.  |
| | Hello everyone. I am new to c++ and I just wrote a program. I am on linux so just saying. This is the code. What keeps happening is all the commands just keep coming. here is an example. Welcome to the Calculator. Please enter your operation. addition Please enter your … |
| | how can i make a calculator using function and procedure.. |
| | #include <iostream> #include <cstring> using namespace std; class String { private: char *ptr; public: String(); String(char* s); ~String(); operator char*() { return ptr; } int operator==(const String &other); }; int main() { String a("STRING 1"); String b("STRING 2"); cout << "The value of a is: " << endl; cout << … |
| | Hello all! I am working through a book here and it says that there is a class-template "basic_string" that is used in the namespace std as `typedef basic_string<char> string;` to create an alias for the "string" type. However, I know that there is a header file `<string>` for the declaration … |
| | Hello Programmers! I am trying to write a recursive implementation of the quicksort algorithm in C++. I believe you all know what it is so I shall not go into the details. However, I run this, but it never ends. Going through it with a debugger shows that my partitioning … |
| | hey guys Im here again :P Here is my code for bank account class.. #include<iostream> #include<iomanip> using namespace std; class account { private: int account_balance; public: account(int acc) //constructor { if(acc>=0) { account_balance=acc; } else { account_balance=0; cout<<"initial balance is invalid"<<endl; } } int credit(int ammount) //credit member function { … |
 | I built one Sync code. I am using eclipse for the same. Actually my code is working fine in eclipse. But when I run it in Tizen OS device. I am using beecrypt library for the same. I have one line auto_ptr<Mac>(Mac::getInstance("HmacSHA256")); Actually, it is throwing exception on this line. … |
| | can anyone please tell me what's wrong with my code? I have made this code but the compiler is giving the error that all member functions are non-class type. I can't fix this. Here is my code: #include<iostream> #include<string> using namespace std; /*class Invoice which demonstrates capabilties */ class invoice … |
| | hey guys can anyone tell me what is actually happening in the code given below.?? #include<iostream> #include<conio.h> using namespace std; int main() { int randNum = (rand() % 100) + 1; while (randNum != 100){ cout << randNum << ","; randNum = (rand() % 100) + 1; } cout<< endl; …  |
| | I read about cherry-picking. It says: You have one branch x1 and branch x2. You want to take one commit from many commits of x2 and want to merge it with x1. You have 4-5 commits in x1 and now you take one commit or range of them and want …  |
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