51,593 Topics
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 | Can someone [B]please[/B] provide some insight on this: [code=c++] int get_smtp_line( void ) { char ch = '.'; char in_data [255]; char * index; int retval = 0; index = in_data; while (ch != '\n') { if ( (retval = gensock_getchar (SMTPSock, 0, &ch) ) ) { gensock_error ("gensock_getchar", retval); … |
| | Hi, I have a big project (#1). this is its direction: Project I Software for a Bank Write a C++ program for the following task: a) Should allow 5 users with user name & password [ (Ohlone1, Ohlone1pw), (Ohlone2, Ohlone2pw),( Ohlone3, Ohlone3pw), (Ohlone4, Ohlone4pw), (Ohlone5, Ohlone5pw)] b) Display a welcome … |
| | Ok, I have asked this b4, and I don't think I have gotten a straight forward answer, I really need this answered, because what I am doing is "legal", but i am 100% it does not make logical sense. This it the original C# code [CODE] var version = reader.ReadUInt32(); … |
| | Hi all, I'd like to open a file dialog using win32 project ...I need a simple code example that uses FileOpen...I used <commdlg.h> ...::GetOpenFileName or ::GetSaveFileName but i can't get them to work :S ... Thanks in Advance, |
| | Hi another exercise which im having problems with. In this challenge im given a four digit integer and encrypt each digit as follows. Replace each digit by the sum of that digit plus seven mod 10. Then swap 1st and 3rd digit places and 2nd with 4th. Heres what i … |
| | hii, this is my .h ,file : [CODE] /* * sortedlist.h * * Created on: Jan 16, 2011 * Author: saeed hardan */ #ifndef SORTEDLIST_H_ #define SORTEDLIST_H_ #include <iostream> #include <functional> namespace mtm { template< typename T, typename Compare = std::less<T> > class SortedList { private: struct ListNode { ListNode … |
| | Hello I have a problem with reading the coordinates of points which are extracted from (..txt ) file.I have read the file with ifstream but I don't know how to use the information then. Thanks in advance the point are in File as followed : u:1.2000 v:4.5400 u:2.5450 v:6.4500  |
| | I have a program that accepts multiple lines of strings for a variable and accepts another set of multiple strings for the next set of variables, and so on, each seperated by a free line i.e.\n\n How do I write such a program? |
| | [CODE]bool is_prime(int a) { if(a==1){return false;} if(a<4){return true;} if(a%2==0){return false;} if(a<9){return true;} if(a%3==0){return false;} int i; for(i=5;(i*i)<=a;i+=6) { if(a%i==0){return false;} if(a%(i+2)==0){return false;} } return true; } [/CODE] critique welcome. |
| | main.cpp [CODE] #include "includes.h" #include "LOGMSGs.h" int main() { LOGMSG("TEST"); getch(); return 0; } [/CODE] MYSQLcon.cpp [CODE] #include "LOGMSGs.h" int Mysql() { MYSQL *con, mysql; mysql_init(&mysql); const char * host="localhost"; const char * user="test"; const char * pass="test"; const char * db="NewServer"; con = mysql_real_connect(&mysql,host,user,pass,db,NULL,NULL,NULL); if (con == NULL) { … |
| | i am a student and i use turbo c 3.0 and 4.5 its compulsory for the computer programming course but there is one error i get when try to run a code having graphics.h on 4.5 that BGI graphics not supported under windows but the same code runs fine on …  |
| | Good evening. I've recently had an assignment to create a doubly linked list that is self contained. This means that the entire list is contained in a single class - the class acts as both the list and the node. I've completed everything and have gotten to my final task … |
| | logmsg.h [CODE] void LOGMSG(string logmsg,...)//... { stringstream name; name<<"test "<<TM.years()<<"-"<<TM.month()<<"-"<<TM.day()<<".log"; ofstream log; log.open(name.str(), ios::out | ios::app); log <<TM.hour()<<":"<<TM.mint()<<":"<<TM.sec()<<" Message: "<< logmsg<<endl; } [/CODE] main.cpp [CODE] int main() { int a = 100; LOGMSG("type test!!",a,"times"); }[/CODE] but it's only wtite into the file "type test!!" while i want it to type … |
| | I'm quite new to the standard template library, I'm trying to understand how to use them with my code. There may still be some logic errors in my code. However I am trying to sort out my syntax errors. One big one is this: type/value mismatch at argument 1 in … |
 | Hi there, it's been awhile :$ I have just completed a small easy exercise which was to create an Account class, providing a constructor to receive the initial account balance, add some money to the initial balance and withdraw some money (providing that the amount of money to withdraw is … |
| | Hello Vivayan! Its taken me this long to understand your sophisticated program you gave me using STL (Standard Template Library) iterators, container classes, algorithms, and the works! I’m truly grateful for the time you took to develop this program for me, and it inspired me so much I’ve decided to … |
| | Please help me debug this. Ive used a permutation generator class as a dll file. Its not loading. Please help me. Main Project: [code]http://www.mediafire.com/?7glk636ncm49spx[/code] DLL: [code]http://www.mediafire.com/?l41b3l2uaugqmwz[/code] Thanks. I had some problems with strings and stringbuilders. It would be nice if someone could suggest a better solution after seeing my code. … |
| | The bit of code below is giving me the error: Cannot read from a closed TextReader. [CODE]public static int maxUsers(int logMinute) { StreamReader maxNum = new StreamReader(@"C:\Users\jplishka\Desktop\LoginSorted.csv"); string sortedstrline = ""; string sortedUser = null; string sortedComputer = null; string sortedDate = null; string sortedInTimeSec = null; string sortedOutTimeSec = …  |
| | I have been doing a lot of reading online about memory stream types, and I am trying to avoid using the gcnew MemoryStream() from the System header in this program. Here is an example of what I need to be able to use it for. [CODE]var reader = new BinaryReader(new … |
| | [QUOTE]You said the function returns just a single character yet you are trying to return a character array. You can't have it both ways. What you should have done is [icode]char* getEmpName()const[/icode] -- notice there is a * after char to indicate it will return an array of characters.[/QUOTE] Hi, … |
| | I am having a mental block with this LINQ expression and cannot seem to figure out how I need to convert it to C++. [CODE](var item in inTables.SelectMany(table => table.Items))[/CODE] This code applies to the following piece of code [CODE] foreach (var item in inTables.SelectMany(table => table.Items)) { Trace.Assert(oldDrs.Position == … |
| | Hey guys, This is only my second thread on DaniWeb and I am a beginner programmer. My code looks like this: (really easy to understand and shouldn't need any further explanation besides the fact that I need help understanding why when i give an answer related to the 'else' loop, …  |
| | I don’t know why my operator += and operator + string class member functions are taking so long to do their job and are so inefficient compared to the Standard C++ Library String Class. Its not that they don’t work; its just that they are slower by a factor of … |
| | Hi, The program below takes input from user the marks of 10 students in 6 subjects and gives output as: [output] Maths Phy Chem Bio C.Sc Eng Tot Stud_Avg studentname1 10 20 30 40 50 60 210 35 studentname2 20 30 40 50 60 70 270 45 -- -- studentname10 … |
| | I tried many codes in internet for this but it says Access violation. Can somebody provide me the code snippets in C++ and C# for this?  |
| | hi, i m trying to make something like a login page and i used the following code to compare the Users password from a password text box and then compare it with the Database password to see if it is the same. nevertheless when i compare the strings the system … |
| | beth = ted; // beth equal to ted ( 1776 ) beth = *ted; // beth equal to value pointed by ted ( 25 ) [B]beth = &ted; // is this statement result in a compiler error? if beth is an int variable[/B]  |
 | Hi, I am in need of a good reference for C++/CLI. Right now I need to know how to exit the main loop of a form, such as if the user clicked the 'X' at the top right. Nevermind, the function Close() is what I needed. |
 | Ok.. so uptil now I've been using the DOS compiler and IDE for C++, version 3.0 by borland...(which is like ancient history).. But now I think it's about time to upgrade :P So since I have been away from C++ for a loooooong time, I need to start from scratch. …  |
| | I have a program which needs to take the logical drives returned from the GetLogicalDriveString function and store them in a string array for later use in a filepath. I tried doing this directly and it failed. Here's my code: [CODE]#include "stdafx.h" #include <iostream> #include <io.h> #include <time.h> #include <string> …  |
| | Ok, so there is a place where the code is being converted into ASCII standard, and then being converted back I believe. I think I know how to do it, but I wanted to get help to make sure that when i am testing for bugs later that this isn't … |
 | Hello everybody.Say i have a template declaration of a class: [code] template <DWORD Style=BS_DEFPUSHBUTTON, LPSTR Type="button"> class WndObj { WndObj (); }; [/code] Now in the cpp file the definition should look something like this: [code] template <DWORD,LPSTR>WndObj<>::WndObj () {} //so i can go ahead and typedef WndObj<> Button; [/code] … |
| | My c++ program asks for input of a integer type if the user inputs a character/string then the program crashes is there another method for this or another way to fix it thank you. |
| | [CODE]#include <cstdlib> #include <iostream> #include "ccc_time.h" using namespace std; int main(int argc, char *argv[]) { double r[10]; Time now; int seed=now.seconds_from(Time(0,0,0)); srand(seed); for (int i=1; i<=10; i++) { r[i]=(rand()%10+1); cout << r[i] << endl; } system("PAUSE"); return EXIT_SUCCESS; } [/CODE] This generates numbers between 1 and 10. What do I … |
| | I know that arrays have to be given a size when using them, so I tried to, but this piece of code doesn't seem to want to be accepted by the compiler. data is a std::vector<char> so i tried using the .size() function to use the size of the vector … |
| | In a statistics book there is an algorithm of generating pseudo-random numbers with uniform distribution [0,1]. It says: I. Enter an initial variable X positive integer. II. Multiply X by variable "a", which should be at least 5 digits long. III. Divide a*X by value p (positive integer). IV. Take … |
| | [CODE]Table table; table.UpdateSeats(false, false, false, false, false, false); std::list<bool>::iterator Test = table.GetSeats(); std::cout << "The current status of seats: "; for (int i = 0; i < 6; ++i) { std::cout << " " << *Test; ++Test; std::cout << std::endl; }[/CODE] No compiler errors or warnings, just a Debug Assertion … |
| | I have the following code: [CODE] #include "stdafx.h" #include <windows.h> #include <GdiPlus.h> #pragma comment( lib, "gdiplus" ) int GetEncoderClsid(const WCHAR* format, CLSID* pClsid); void gdiscreen(); void gdiscreen() { using namespace Gdiplus; GdiplusStartupInput gdiplusStartupInput; ULONG_PTR gdiplusToken; GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL); { HDC scrdc, memdc; HBITMAP membit; scrdc = ::GetDC(0); int Height = … |
| | TIMERS.h: [CODE]#include "includes.h" class servtime { public: int sec() { int sec; time_t rawtime; tm * timeinfo; time(&rawtime); timeinfo=localtime(&rawtime); sec=timeinfo->tm_sec; return sec; } int mint() { int min; time_t rawtime; tm * timeinfo; time(&rawtime); timeinfo=localtime(&rawtime); min=timeinfo->tm_min; return min; } int hour() { int hour; time_t rawtime; tm * timeinfo; time(&rawtime); … |
| | Hi there, Im a structural engineer (so excuse my limited knowledge of C++ and programming in general) and write analysis programs using microsoft visual studio. I've developed a few programs that run within VS but am wondering how I would go about making these stand alone apps/programs anyone could use … |
| | Hi all, I want to make my own widgets in c++, but don't know where to start. I didn't find any examples, tutorials,... on google. I know there are some toolkits like qt, gtk+, wxwidgets, and i've used them already, but i want to make some myself. Qt says to … |
| | Hello, I am trying to create a program to read text from clipboard. It works great, but when I copy a file the program crashes. I am trying to make it to ignore any files and only output text. My code so far is the following: [CODE]#include "stdafx.h" #include <iostream> … |
| | Hello, I am trying to upload a file via ftp using the library curl. Of course I looked [URL="http://curl.haxx.se/libcurl/c/example.html"]here[/URL] but the exemples don't say how to do this using usarname and password. Aslo the code is in C and if I compile it in C++ I am getting: [CODE]error C2664: … |
| | this was probably a bad idea to begin with since i've never messed with multithreading or the sapi... but i got the sapi working on its own, but when I put it in its own thread it wont speak anymore. I've tried over and over and over.... i'm not sure … |
| | Hello, I have a dll that I wrote and a driver program to call that dll. Both the programs were written in VC++ 2008 express edition. The program takes in 2 strings as a command line argument and passes it to the dll which prints the 2 strings in the …  |
| | [CODE] time_t rawtime; struct tm * timeinfo; char sec [80]; char min [80]; char hour [80]; char year[80]; char month[80]; char day[80]; time ( &rawtime ); timeinfo = localtime ( &rawtime ); string timetest; timetest= strftime (sec,80,"%S",timeinfo); timetest= strftime (min,80,"%M",timeinfo); timetest= strftime (hour,80,"%H",timeinfo); timetest= strftime (year,80,"%Y",timeinfo); timetest= strftime (month,80,"%m",timeinfo); timetest= … |
| | Hello, Is it possible to use ctypes for this? I tried a sample code from net but it is not working. [CODE]from ctypes import cdll myDll = ctypes.LoadLibrary('C++dll.dll') mydll.testString()[/CODE] Can u tell me how to load a C++ dll and call the functions from python?  |
| | Hello All, I've been learning C++ recently and my question pertains to inheritance. What I have is code like this: [CODE=cpp] class shape { public: virtual void print_type()=0; double delta() //acts the same on all shapes }; class sphere : public shape { public: void print_type() { cout << "this … |
| | Help random numbers rand() returns same numbers I am trying to make a blackjack program which uses srand() with time as seed to determine random number of card between 1-10. Two problems, one is that the first three returned numbers are always similar and one digit or so more than … |
| | This is a simple game that I am bringing to a close. It is called Slash and Smash. The goal is to defeat the last opponent, who is a champion of the arena. In the game player can use potions for health and energy,go to sleep, heal up, eat and … |
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