51,593 Topics
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| | Hi, I know the return value of generic search algorithm "find()" is of iterator type. Now how can I output the return value as numeric type? For example: [CODE] short myArray[4] = {2,1,3,7}; vector<short>mVec(myArray,myArray+4); vector<short>::iterator found; found = find(mVec.begin(),mVec.end(),2); [/CODE] In this code the variable found will be assigned the … |
| | Hi everybody, I am having some problems with a multi-threaded application I am developing. I get segmentation faults in different places, always related to std::string, using g++4.3.2 on Ubuntu 8.10 server. Here is an example: [icode] #0 0xb7e18bb6 in memcpy () from /lib/tls/i686/cmov/libc.so.6 (gdb) up #1 0xa8eb1014 in ?? () … |
| | Hi Guys, I have written a windows c# service that basically write out some text to a file in the onStart function. The program works fine when i manually start or stop it. Now if i leave it started and restart my system, the service does not seem to do … |
| | Hi Guys, Need some help....... I want 2 read a huge file which contains binary data. Is it possible for me to make use of hash tables to read the same? if so, how can I do it. If the key value of the hash function is and integer we … |
| | Hello everybody, I started c++ half a year ago, with the .cpp programs. Now i want to create a program with the Windows Application forms. But how can i multiply with textboxes? I want something like: textBox1->text = (textBox2->text * 3) But this code gives an error, i need something …  |
| | 3. Create a class by vector with an array of” int” type as its member data (The array created dynamically)find the last largest and avg value of the vector 4. Explain the sequence of steps to be followed in performing the following operations over a binary file catching of empty …  |
| | [code=c++] #define MIN_PASS_LENGTH 6 #define MAX_PASS_LENGTH 12 #define NUMBER_OF_PASSWORDS 3 #include<iostream.h> #include<stdlib.h> #include<time.h> #include<conio.h> #include<fstream.h> #include<string.h> //int i; //letters //int j; //numerals char rand_small_letter() { int nHigh = 122; int nLow = 97; int small_letter = ((rand()%(nHigh - nLow + 1)) + nLow); //values from 97 to 122 return (char)(small_letter); …  |
| | I have not yet started this, I want some advice on how to proceed before I waste too much time! I am writing a Service which listens on a COM port, parses input, and stores relevant data to a database. I am fine with all of this, except I need …  |
| | I wrote this program back in high school 10 years ago and I found it today. I'm getting back into programming and I'd like to get it working again, some of the headers are deprecated which I tried to fix, and I was using borland c++ and now have Dev … |
| | Hello~! ...again.. I got some help from you guys a while ago with this same app because it wouldn't run on winxp. It runs fine now, but my brother is still telling me he cant get it to work right...so rather than go through all the trouble of trouble shooting(he … |
| | 1. Create a class by name student with the necessary member data provide the facility. A. Create a list of stack B. search a student by reg.no 2. Create a class by name dates A. overload “<” operator to compare two dates B .overload “++” operator to compare date by … |
| | Hi, I am now using VS2005 to write a console program. Since the [CODE]int main(int argc, char** argv) [/CODE] function is designed to accept parameters, how can I pass them to the program while debugging in step by step mode?thank u in advance. |
| | I'm developing a recursive method for a class which will return a complicated data structure (a list of dictionaries which will contain lists of dictionaries as values). The data structure could be something like that: list<map <string,list<map <string,list< map<string,list<...> > > > How can I refer to this structure while … |
| | [code]Excel.Application ExcelApp = new Excel.ApplicationClass(); ExcelApp.Visible = false; String WorkbookPath = filename; Excel.Workbook ExcelWorkbook = ExcelApp.Workbooks.Open(WorkbookPath, 0, false, 5, "", "", false, Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false); Excel.Worksheet Sheet = (Excel.Worksheet)ExcelWorkbook.Sheets[1]; DataTable newTable = new DataTable(); string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filename + ";Extended Properties= Excel … |
| | how to access odbc ms access database by C from msvc++2008?  |
| | i am doing bscs from GCU lahore PK.i have assigned a project name as MOVIE RENTAL STORE using OOP concepts plz help me to do my project i,ll b thankful to you, umair ahmad |
| | i tried to create a program that would get the sum of the squares but i couldn't get the right output. Could u help me debug? and tell which part of my codes where wrong.PLEASE! :S [code=cplusplus] #include<iostream.h> #include<conio.h> #include<math.h> int x,num; int f(int); main () { clrscr(); cout<<"Enter a … |
 | Hello, I'm making an application in Visual C++ that hides/shows an application window from taskbar by clicking a button. First problem (googled it) is that I don't know how to retrieve the information about a window state (SW_HIDE,SW_SHOWNORMAL, etc.). Is it hidden, minimized, normal or maximized? I only know how … |
| | right now im working on a program that reads a series of numbers (doubles) from the user, then prints the mean and the range. also: • I do not know ahead of time how many numbers will be in the list. • When ctrl-z if pressed, stop asking for user …  |
| | Today is the first day I have attempted Operator Overloading and am running into a few errors so any assistance would be great! The first one I'm having issues with is here: const MyString& operator=(const char* rightOp) The assignment operator should also be overloaded to allow assignment of a C-style … |
| | I have been working on this program for school, it does some things right but with a few things I am struggling. [QUOTE]For this assignment you will be writing a two person chip game. You will start out with a pile of 1000 chips. Each player will have the chance … |
| | [code] int number; char letter; cout << "\nEnter a number\n"; cin >> number; cout << "\nEnter a letter\n"; cin >> letter; cout << "\nThanks!"; [/code] Let's say I had 5 of these questions lined up, it seems the user could just type something like "1 a 2 3 4" on …  |
| | I am trying generate even fibonacii numbers less than four million, but I keep getting negative numbers at some point and eventually it converges to a positive answer, which is obviously wrong. Can anyone please help me out? #include <conio.h> #include <stdio.h> void main (void) { clrscr(); int f1=1; int …  |
| | How could one share a .exe that loads textures. I am using c++ and openGL. I want to share the .exe that I made using rapidshare. |
| | Hi All I am writing a C# windows application and it needs to run in a standard user account, however, the application should allow a standard user to create further standard user accounts using Vista\Windows 7. In order to create new accounts you need to be part of the administrator … |
 | I'm trying to start writing tests for all of my functions as per Test Driven Development. My question is, say I construct a test for "rotate vector". It would be something like this: [code] int TestRotateVector(const Vector &V) { Vector Original(1.0, 2.0); Vector Rotated = Original.Rotate(10); //rotate 10 degrees if(Rotated … |
| | I've created a class and create two new objects from that class. 3 variables are stored as private. I have mutator and access functions for these variables. When I try to write a value through these functions, they don't seem to change the variable in the class. What am I … |
| | What could be the possible explanation of this program output? I am trying to learn c++ so please help [code]#include <iostream> using namespace std; int main( ) {int b[3][2]; cout<<sizeof(b)<<endl; cout<<sizeof(b+0)<<endl; cout<<sizeof(*(b+0))<<endl; // the next line prints 0012FF68 cout<<"The address of b is: "<<b<<endl; cout<<"The address of b+1 is: "<<b+1<<endl; … |
| | I have a Windows program (Visual C++ CLI Type) that displays video in a sub window. When something happen the user makes a note of the event by hitting a button. The problem is that the event involves a number of choices and finding the right button to click is … |
| | I have a program in which i open a a text file, access it's values and create and array with it. for example the text file may contain these values: 1 44 3 4 33 6 7 8 61 10 ; that's 10 integers what c++ tools could i use … |
| | I have a strange bug in vs2008. ostream open fails when called in the following manner: [CODE=c++]ofstream filestr; filestr.open((filename.c_str()),ios::in|ios::out);[/CODE] when called like this it works without a hitch: [CODE=c++]ofstream filestr; filestr.open("blahblah.txt",ios::in|ios::out);[/CODE] Any ideas? Thanks |
| | Hi I got a code that in pseudo dos something like [CODE] ifstream os; while(os.oef()){ os.getline(buffer,length); } [/CODE] If some condition is met, I'd like to be able to jump back to the previous line, such that the next getline will give the line just-read in, at a later time … |
| | Hi, I have some questions on vector. Please consider the code below. I use g++ compiler on Linux. [CODE=c++] #include<iostream> #include<vector> using namespace std; class Sampler { int a; int b; }; int main() { vector <int> vec1; vector<float> vec2; vector<Sampler> vec3; cout << sizeof(vec1) << " " << sizeof(vec2) … |
| | how to animate object in C#. moving from left to right or vise versa  |
| | The age old issue of string parsing comes up again ... I have a text file that contains lines that are SUPPOSED to follow a set format, specifically: string, string, long string int string double int The delimiters are therefore: Comma (,) for the first two fields Spaces for all … |
| | Not sure this is going to be easy to explain but ... I have a class (A) that needs to have access to a map (mapCodes), this map is the same for all instances of class(A), therefore I don't want to create an instance of the map for each instance … |
| | [code] string s; cout<< "Enter name: "; cin >> s; cout<<"\n"<<s; [/code] on running this i need: Enter name: Tejesh Kinariwala Tejesh Kinariwala it is showing: Enter name: Tejesh Kinariwala Tejesh so how to get the input till user hits return key, instead of breaking it at space |
| | i've wrote a code that read and write to some files, and i have a segmentation fault when i'm running it in the g++ (in the visual studio i don't have any problem like that..) anyway, i think the fault may come from this line, can anyone tell me if … |
| | Hi i have to make this work... [code=cplusplus] //INFO: -eingabeprüfung auf buchstabe/zahl // -eingabeprüfung auf zahlenbereich // -wiederholung einbauen vill... #include <iostream> using namespace std; int main() { int eingabe; cout<<"Geben sie eine zahl ein> "; cin>>eingabe; if(eingabe>0 && eingabe<13) { switch(eingabe) { case 1: cout<<"eins"<<endl; break; case 2: cout<<"zwei"<<endl; … |
| | gives me error main /* The purpose of this lab is to open a text file and then make a copy of it */ #include <iostream> #include <fstream> #include "Interface.h" using namespace std; int main() { //open up file to be read from string input; ifstream in; cout<<"enter file name … |
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| | I'm trying to write a program that asks the user for a number between 1 and 10, then prints a line of that many “X"s. The program compiles, but I cannot figure out how to make the variable 'total' print X's instead of a the actual number, if that makes … |
| | I need to write a program that decides if you can apply for the job or not. After asking a series of questions (all the questions) the program then needs to print out whether you can apply or not. Here are the requirments for the job • If you are … |
| | I'm having a lot of trouble finding enough RAM for a program I'm writing on Vista 64 Ultimate system, even though the system has 8GB RAM and only 2GB is used. I tried to see how many 10 million byte blocks I could allocate using malloc(), and the compiled program … |
| | Help, am a c++ student who is completely stuck. I know that there are some stupid errors in this, I've been working all day on this and I still can't find them. I'm supposed to create a class, copy constructor, and than create an instance in main and then create … |
| | I have a slight homework problem that is giving me some trouble. We have to write the algorithm for subtraction using different bases as a possibility in a program that uses calculator registers. The following is the provided prototype: bool subtractRegisters( int registerX[], int registerY[], int registerZ[], int base ); …  |
| | Hi there! With reference to the annoyance of this problem, I've spent some time searching the web as well as on here however, with few ways to extract useful threads from those less useful when typing 'RegSetValueEx int' or the like, posting was a final solution. Apologies if this type … |
| | Hi, i have one doubt regarding datagridview in windows. i can take one column named "Description". I enter rows more than one for that column. but i want set the size of the column,here my requirement is 500 size for that column. pls help me, how to set the column … |
| | how can I use a loop to sum random numbers together? it needs to be able to sum any amount of numbers determined by the user. I can generate the random numbers but adding them is a different story. I tried to make an inner loop (if that makes sense) … |
| | I often hear the saying that iostream is inefficient in terms of performance, and it is better to use printf family if type-safe is not concern. But as far as I know, the static type checking (is this thing people call the 'type-safe' do?) is done in the compilation, and …  |
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