51,593 Topics
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 | Problem 1: You are given n you are required to print the following rhombus. Example: n=5 1 121 12321 1234321 123454321 1234321 12321 121 1 Problem 2: Max Subsequence sum using 3 nested for loops. (n^3) Max subsequence sum using 2 nested for loops. <-- Challenge (n^2) You shold print …  |
 | Hi i started the book c++ from ground up,but looks like it's too old.I came across the bonded array.Question- what are they,where to use them,how and are they still used in c++11? Thank you .  |
 | I'm trying to run a program with command line arguments. I keep getting the following error: This application has failed to start because libgcc_s_dw2-1-.dll was not found. Re-Installing the applicatiob may fix this problem. I have no clue what to do with this. The code works on the school computers … |
| | I'm sure this question has been asked before, but I'm at a loss here. I've been attempting to get a piece of C++ code to work. It works perfectly on Windows AND Linux (Multiple distros tested on) however Mac is proving a pain. I'm executing a Jar from C++, and … |
 | Hey all, I was wondering about this piece of code on how to make it simpler to find the needle in the haystack for example "abbaabbaabb", "abba" - the needle, "abba" is found 2 times in the haystack "abbaabbaabb". I have this code: unsigned int substringCount(const std::string& strng, const std::string& … |
| | I have written a code that uses system power broad cast messages. and when laptop is running on AC power it executes a program. What i want to know is when i try to compile the code with registerpowersettingnotification function dev c++ compiler shows errors. When i remove that function …  |
| | i received bytes data from some other function to myfunction(const void *data) where pointer data stores the values like {0,0,0,0,0,0,0,40,20,0,0,0,0,0,0}. I created an array data1 to store the values {40,20,0,0,0,0,0,0} from the above values considering endianess issue i also reversed data1 and used memcpy to copy data1 but having problem … |
| | the title says it all i,ve been trying functions like sleep usleep and delay all of them dont work  |
| | i got a project in c++ and want to make graph and shaps in c++ but i got this error i am using borland 5.02 if any one knows this please |
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| | Hi Guys, I'm a beginner. Can i ask, how to write the code for delete or backspac in a password if i key in a wrongly? Example: Password is 123456 But I accidentally keyed 124, so how do i delete/backspace 4 so i can key in 123456 again.  |
| | How can i write a program that uses for print statements to print 6 pattern of asterisks? |
| | hey there Daniweb. So I am in need of some help with a project I have. We need to create a program that will print out rows of asterisks as tall as defined by the user. [CODE]For example, if the user entered, 1 2 3 4 3 2 1 10 … |
| | The containers SET/VECTOR/LIST/MAP are very similar in use,so how to choose which one to use? Is where any special cases? Thanks  |
 | after compiling,when i run program my 'FTN 95\PLATO' recently showing me black DOS box,only reading "PREES 'RETURN' to cotinue" without executing the program. could u say why is this happening ? |
| | kindly help me in making program in the permutaion of 1,2,3,4,5. Permutation means the arrangements of the numbers 1,2,3,4,5. ex. 1,2,3,5,4 1,2,4,5,3 and so on.. there are 120 results. |
| | //Hi,can someone explain what is the difference of declaring the main in C++/C++11 //What is most common may to use or it's metter of personal choice? int main() { return 0; } /////////////////// int _tmain(int argc, _TCHAR* argv[]) { return 0; } /////////////////// int main( int argc, char ** argv …  |
 | So I've built a Queue data sructure(all the needed methods) and I just wanted to know how can I use my Queue objects in different project ? |
| | #include<utility> #include<tuple> #include "stdafx.h" #include<string> using namespace std; int _tmain(int argc, _TCHAR* argv[]) { pair<int, string>p(42, "forty-two"); cout << p.first << " " << p.second << endl; p = make_pair<int,string>(112,"one-one-two") ; cout << p.first << " " << p.second << endl; return 0; } // Can some one help to … |
| | Hi DaniWeb, I've been programming a litecoin clone for about two weeks now. I came to build the daemon to acquire a merkle hash, but It give me this error. Error: To use vizcoin, you must set a rpcpassword in the configuration file: /home/crypto/.vizcoin/vizcoin.conf It is recommended you use the … |
| | Hi guys, I have a class called Account with variables called Balance and Status. The Member Name is given by the User through cin and represents an the Account Number. How can I diynamically create an object through cin and give their variables a value through cin? I have been … |
 | Hello programmers! I am working on a program that checks if a user's input is a palindrome (in this case, the input is a string). I am using a custom class template "stack", that is a constrained version of my custom class "List", which is a linked list class template. … |
 | i'm creating the form class. the form us showed and the window procedure works. the problem is that some messages(like WM_CREATE) aren't working. so how can i connect, correctly the form to window procedure? |
| | i'm build a function for do the combination of keys(like the kombat games: we do some combination keys for do an actions): bool CombineKeys(std::vector<int> const keys) { static bool PreviousKeyPressed; static DWORD StartTimer = GetTickCount(); static int i=0; if((GetAsyncKeyState(keys[0]) & 0x8000) and PreviousKeyPressed==false) { i=0; SetWindowText(a,"hello"); PreviousKeyPressed=true; i++; } else … |
 | Hi,can anyone help me how to start programming With MFC C++ ? and what's the best learning source for it? and is it good to learn that ? i am have some good experience with c++ and i am looking forward to design some gui programs ,i know that there …  |
| | Hi there, I am having problem with deallocating string two-dimensional dynamic array. My program works fine but for some conditions such as when row size is greator than column size in 2d dynamic array, the program crashes when it goes into destructor. My program is as follows : #include <iostream> … |
| | I'm having a problem with a program of mine at the moment. Basically, the thought process was to see if the input was whether an int or a string. But as soon as I tried to test it out, it produced an error along the lines of "could not convert …  |
| | When I dynamically allocate mem within a function, do I have to still manually release it? Or does it go away once the function has run and returned (like local variables)? If I do have to release it, since it's basically a pointer can I do that from main? Do … |
| | Hellp programmers! I am working on a program that uses two objects of a custom class template List [which is a linked list, with each item pointing to the next] and concatenates them. Initially, I need to input numbers into my main function, so I have two sets of while … |
| | Hi all, I was just playing around with some ideas about optimizing a core piece of my library: the run-time type identification system (RTTI). What does that have to do with compile-time string concatenation? Well, the whole point of the RTTI is to provide information on the type of objects, … |
 | Can you please help me with my Problem here? What I want to do is: 1. Input Username & Password (Make Password in Asterisk (*)) 2. If it is True / Right Proceed to the Main Program 3. Else If False/Wrong give another Trial (Do you want to try again? … |
 | Hello Friends ! I am working on a project of CD CAFE. In which I have arranged movies like this : Movie Name::::Genre::::Hero of Movie::::Heroine of Movie and I have entered data in this. Now I want to add search option in my program that I can search by Movie … |
 | Consider the following code: #include<stdio.h> #define msizeof(type) ((char*)(&type) - (char*)(&type - 1)) int main() { int x; printf("%u %u\n", msizeof(x), sizeof(x)); return 0; } The Above code when compiled with g++ compiles just fine and works well without any wanrings, while in gcc it gives the following warning: `integer overflow … |
| | #include "stdafx.h" #include<vector> #include<iostream> using namespace std; int main( int argc, char ** argv ) { // from initializer list (C++11) cout << "vector from initializer list (C++11): " << endl; vector<int> vi1 = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }; cout << "size: " … |
 | how can we use write and read functions in files and why we use these function because i have already get put or cin cout available. |
 | how to find length of a character string without using while loop or user defined function? |
| | Hi there, i was trying to make a program (to do)using list class here is the code #include<iostream> using namespace std; #include<list> #include<string> void display(const list<string>& lsy){ list<string>::const_iterator iter = lsy.cbegin(); int i = 0; while (iter != lsy.end()){ cout <<++i<<"- "<< *iter << endl; ++iter; } } void add(list<string>&ls){ … |
| | The user is asked to input a number in either Hex, Octal or Decimal, which is then converted to Hex, Octal & Decimal. The user can exit the program from the MAIN MENU or by the Escape key after each convertion. Compiler : Borland Turbo C++ v4.5.  |
| | Hello I am having some trouble with something. As I read the contents of a file into an ifstream object I occassionally want to dump all its contents into a stringstream to analyse it. Example below. The problem I am having is that if I use ifstream.rdbuf() to dumpt the … |
| | Having a hard time trying to wrap my head around why my grid system fails, I'm assuming my train of thought is stuck at the moment(akin to writers block). My understanding of grids is while the current cell isn't the last one in the column/row(w/e is horizontal) /*do stuff*/ then … |
| | Is it possible to stop the lets say for loop with a function : for(int i = 0;i<15;i++){ cin >> input; obj.add(input); } // and then have some add or some other function that checks if (x == max_size) check(){ if(counter == max_size) stop the foor loop and continue.. } |
| | This is driving me nuts. I'm writing a password program that reads from .txt file into an array of char arrays, and then allows the user to write a new password and then appends it to the end of the list. Everything SEEMS to be working except everytime I run … |
| | i'm build a completed new code for properties: #include <iostream> #include <functional> using namespace std; template <typename T> class property { private: T PropertyValue; //i think these is ok, but something seems not std::function<T(void)> getf; std::function<void(T)> setf; public: property() { getf=NULL; setf=NULL; }; property(T value) { PropertyValue=value; }; property(std::function<void(void)> GetFunction=NULL,std::function<T(void)> … |
| | i put an image on form with WM_PAINT message. but the image is, only, showed after resize(for example) the form. why is that? did i forget any style\extended style? |
| | Hello programmers! I am working on a custom tree class [with the code example being copied from Dietl's C++ How to Program, 9th edition]. It is in my fashion to copy all the code examples in the book when reading it (for muscle memory), but the authors created a custom … |
| | It's a code to calculate age from today's current date. I know I'll have to use #include <ctime> But I have no idea what I would use for the rest. Here's my code: package practicing; import java.util.Calendar; import java.util.Date; import java.util.Scanner; public class FindRelativeAge { private static Calendar calendar = … |
| | Hi programmers! I am trying to grasp the concept of friendship. Let's say that we have the following: class List; //forward declaration class ListNode { friend class List; //make List a friend /* rest of code here, blah, blah, blah. */ } Does this mean that ListNode can access Lists's … |
| | heres a nice tutorial about regions: http://www.flipcode.com/archives/Win32_Window_Skinning.shtml like you see, these tutorial is for forms.. so how we can do with child controls!?! we can: add the WS_CLIPCHILDREN or WS_CLIPSIBLINGS style, when we create a button\other control: hwnd = CreateWindowEx( 0, TEXT("CBUTTON"), strCaption.c_str(), WS_CHILD | WS_VISIBLE | BS_TEXT | WS_TABSTOP … |
 | Hello everyone! I am in need of some help with a homework assignment. It's basically creating a file indexer using C++. I have 2 separate files that I need to read in: one is a text document and the other is a Skip words key. I am incredibly confused about … |
| | The MilTime class should convert time in military (24-hour) format to the standard time format used by the Time class. Theclass should have the following member variables: milHours : Contains the hour in 24-hour format. For example, 1:00 pm would be stored as 1300 hours, and 4:30 pm would be … |
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