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| | Hi forum! I have to find the solution of this system of linear equations: 2x+3y=2 4x+5y=9 I know out to solve the system with paper and a pencil:cool: However I donĀ“t know the way to do this in C# code! Could you give me some tips? Best regards Eduardo |
| | I'm working on comp. science 101 work and I have 4 methods left to do which I can't figure out and I've been trying for hours. Very elementary but difficult for smoeone new to computers and Ruby. For example: I need to write a method called 'diff' which accepts 2 … |
| | i have created a classes on shapes such as triangle and circle. i am trying to create a array for the classes and call a constructor from the classes. i am able to display the elements in the array. i would like to know if im doing this correctly and … |
| | Im just having a problem on my VB 5 update command.. [CODE]Adodc1.RecordSource = "UPDATE Tuition_Fee SET (Amount_Paid, Balance) VALUES(" & WHERE Tuition_Fee_ID_PK = " & Form2.Label16.Caption 'Adodc1.RecordSource = "UPDATE Tuition_Fee SET (Amount_Paid = " & & ", Balance = " & Val(Text1.Text) - Val(Text2.Text) & ") WHERE Tuition_Fee_ID_PK = " … |
 | Okay, here's what I am up to now. I am trying to figure out how to write sin waves to a .wav file, for playback. Here's the issue: I have no idea what I'm doing. I looked up the documentation for the wave module, and have been able to open … |
| | Plzz help, all i have now is Warning: mysql_pconnect() [function.mysql-pconnect]: Lost connection to MySQL server at 'waiting for initial communication packet', system error: 95 in /home/plmzxsi/public_html/hull/Connections/stronaHull.php on line 9 Fatal error: Lost connection to MySQL server at 'waiting for initial communication packet', system error: 95 in /home/plmzxsi/public_html/hull/Connections/stronaHull.php on line 9 … |
| | Arrival.o: In function `NodeItem': /home/jonyb/Desktop/A3-Q2/NodeItem.h:5: undefined reference to `vtable for NodeItem' Arrival.o: In function `~Event': /home/jonyb/Desktop/A3-Q2/Event.h:8: undefined reference to `NodeItem::~NodeItem()' Event.o:(.rodata._ZTI5Event[typeinfo for Event]+0x8): undefined reference to `typeinfo for NodeItem' These 3 errors repeat themselves for all my files accessing NodeItem.h and NodeItem.cpp Now I've looked around and all I could … |
| | Hello, In this situation, my application can connect to the MSSQL server in one of two ways; via a direct TCP/IP connection (WAN) (IP's filtered using RRAS in 2003 Server) or via a VPN connection. The application will first try to open the connection using the WAN connection string and … |
 | // close an account with a given number public void closeAccount(int id) { } this is a bank project... a customer account is created(array). i would like to know how to delete an array? let say: account number 185649 is found in array[15]. then i would like to delete this … |
| | Good evening Daniweb, I have another idiotic problem which comes from making an arrival subclass out of Event. I have a few other subclasses of Event and they aren't giving me any trouble. I have tried to copy/paste/rewrite to eliminate any stupid typos. Arrival.h:7: error: expected class-name before ā{ā token … |
| | hi everyone i want to build pagination with PHP but i cannot for ex i have 100 number of news and i like my page show only 10 news per page so let it displays 10 page and below let it is written page1, page2, page3, and whenever i want …  |
| | i got a problem... i want to find a way to check if something is NOT at the beginning of a new line... how should i do that?  |
| | I can't figure out how to set a radio button within a filemenu. I can use myRadioButton.SetValue( True ) outside of a filemenu. What I'm trying to do is to automatically set a particular radio button dependent upon the last value used. [code=php] import wx class MyFrame(wx.Frame): def __init__(self, *args, … |
 | Hello to all, Despite I added all necessary .jar files to project, I always take boring exception warnings that say "class not found". I added the code and exception output below. I'll be so happy if someone can help me. Thanx in advance.. With regards, T ----------------------------------------------------- [CODE]protected void doGet(HttpServletRequest … |
| | Hello Folks: I had previously posted this problem and someone on this forum suggested that i used s[i] == 'a' || s[i] == 'A' .... but what I have here completely makes sense.. Can you please take a look at it ? [CODE] #include<iostream> #include<string> using namespace std; int main() … |
 | Hi all, I have an issue with a PHP and MySQL deletion script where I am basically trying to delete all records for meetings which have expired. For this, on input, I have a date input calendar which inputs the date in the format 2010-01-18 to the database with the … |
| | My program keeps crashing and I can't see why, if I remove the line [code=php] myfile << data_[i+ndim_*j] << " "; [/code] then it runs OK...but can't see anything wrong with this line? [code=php] void Matrix::WriteToFile(std::string fname) const { ofstream myfile; myfile.open ( (fname+".txt").c_str() ); for (int i = 0; … |
| | how to clear all input fields after submitting data? [CODE]<form method="post" id="registerForm" action="register.php" > <table align="center" cellpadding="2" cellspacing="0"> <tr> <td style="width:120px"><div align="left"><strong><LABEL for="First_name">First name:</LABEL></strong></div></td> <td><div align="left" class="string"> <input name="First_name" type="text" class="input" id="First_name" value="" size="32" /></div> </td> </tr> <tr> <td style="width:120px"><div align="left"><strong><LABEL for="Last_name">Last name:</LABEL></strong></div></td> <td><div align="left"> <input name="Last_name" class="input" type="text" id="Last_name" …  |
| | I am very interested in knowing how i might code a function using the DateTimePicker control to see if i can to check and see if and when any date and day of any given year falls on a sunday so that the function will force a radiobutton.checked from one … |
| | Hello, How can we save a page to another drives/devices I did use a form in my page- result.php- In result.php I put one button for save As. all of the elements are disabled in this page. and I hope that the details of that page will be copied to … |
| | My function is: [code=php] void Matrix::WriteToFile(std::string fname) const { ofstream myfile; myfile.open ("std::string fname.txt"); for (int i = 0; i<data_.size(); i++) myfile << data_[i] << " "; myfile.close(); } [/code] and then in the main I have A.WriteToFile("hello"), but it's saving it as fname still? Can anyone please tell me … |
| | hi all! i'm new with php and i have problem. I have a submit form in which every user places code.when they submit it in database its displayed normally there, but when i try to view the data in php there are missing elements , as b<<c or <iostream> etc. … |
 | Hi everyone, I'm having a problem with understanding the workings of an enhanced For loop. This code is meant to iterate through an array of ints and print out the char value of that int. But it seems to start on the first number in the array, making the program … |
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| | Hello, I would like to add a six-line header to a data file for many files in a loop. However, I need to add the header to a data properly first... My inclination (as a python novice) is to write the header and append the data to the header. However, … |
| | I finally figured out how to use the settings.settings file to create user settings that would persist when reopening my application. I have several text boxes that once completed by the user I would like to retain their data when the app is reopened. This part now works, unfortunately a … |
| | Good afternoon Daniweb, I have a simple (and probably idiotic) problem today, I have a simplistic program that simulates a Train station, trains come in, they go into a stationDock and come out after a while. The stationDocks are an array of trains, either pointing to a train or being … |
| | Hi, I'm using C#, Access 2007 and VS2008 to write a windows app. I have populated a datagridview from a query (taking data from 2 tables). When the user clicks "Save", I want to be able to save any changes made in the datagridview to the database. Only one column …  |
| | hello all; i'm having a problem with my output. the program that i'm writing is supposed to take a number input than display the output as asterisks. so if the input is 4 the output should be: * ** *** **** however, i'm just getting a single column of asterisks. … |
| | Hi all I'm having some trouble with EF and SQL 2008 default values. Firstly, I have a column called 'CreatedDate' and the default value in SQL Server is getdate(). If I add a field in SQL server this works fine. I also have a column called Guid and the default … |
| | ok so i was starting to make a query and thought that there could be a better way of making it. what i am trying to do it only print entries that does not have there value as null. ex: phone IS NOT NULL and street IS NOT NULL i …  |
| | I would like to understand how to retrieve an Image stored in a mySQL database as a longblob. Once retrieved, assign that image asp.net image control. Heres the code that uploads the pic to the MYSQL database [CODE] If (Not myups.HasFile) Then Return -1 End If 'FileName.PostedFile.InputStream() Try Dim fs … |
| | Hi guys, I have a problem with arranging my components in a GridBagLayout. The frame is 600x600. Inside it, there are two pairs of (Label,TextField). They are not where I want them to be. What I would like is to have them all at the top of the frame, one … |
| | hi all i need to learn what does this mean (this style of writing) may be is there another variant to write the code [CODE]<? exit;} if($_GET['step'] == "2"){ $name_db=$_POST['name_db']; $host_db=$_POST['host_db']; $user_db=$_POST['user_db']; $password_db=$_POST['password_db']; $connect=mysql_connect($host_db,$user_db,$password_db); mysql_query("create database $name_db"); $connect=mysql_pconnect($host_db,$user_db,$password_db); mysql_select_db($name_db,$connect); $sql1 = "create table `config` ( `id` int(1) NOT NULL default … |
| | I finished this last night and it almost works perfectly aside from one minor thing that I can't quite figure out. [CODE] #include <iostream> #include <cstdlib> #include <ctime> using namespace std; int main() { int playerscore, computerscore; int turnscore; int dice; char input = 0; bool turnover, gameover; srand((unsigned)time(0)); playerscore … |
| | Dear all, I am working on the code below: [CODE] int cookTime(int time) { int second, minute; for (minute = time; minute > -1; minute--) { for (second = 59; second > -1; second--) { sleep(1); printf ("%i", minute); printf (" : %i\n", second); } } } [/CODE] Now this … |
| | [CODE]import time import calendar # time tuple/list index YEAR = 0 MONTH = 1 DAY = 2 WEEKDAY = 6 # weekdays MON=0 TUE=1 WED=2 THU=3 FRI=4 SAT=5 SUN=6 # months JAN=1 FEB=2 MAR=3 APR=4 MAY=5 JUN=6 JUL=7 AUG=8 SEP=9 OCT=10 NOV=11 DEC=12 HAVE_30_DAYS = (APR,JUN,SEP,NOV) HAVE_31_DAYS = (JAN,MAR,MAY,JUL,AUG,OCT,DEC) HAVE_28_DAYS …  |
| | Hi everyone.. Suppose i have a function : [B]void foo(int ind,float **ptr1,float **ptr2[/B]) that allocates memory using malloc .. - double pointers are much more in reality- I want to use this pointers in other functions too, but when i call them(functions) in main() .. memory leak message appears .. … |
 | I am trying to learn a little about ajax and prototype.js. Here's what I have so far: [B]boardtest.php[/B] [CODE] <html> <head> <title>AJAX Test with new javascript</title> <script src="scripts/prototype.js" type="text/javascript"></script> <script src="scripts/ajax.js" type="text/javascript"></script> </head> <body> <div id="products">(...locaing inventory...)</div> </body> </html> [/CODE] [B]ajax.php[/B] [CODE] <?php $company = $_GET['company']; $limit = $_GET['limit']; $line … |
| | Hi friendz, I completed a project in VB6 recently, its a database handling project, Problem is, I have created a SETUP with all its required files via PDW wizard, when I run that setup just before completing the setup there came a message that "System files are outdated" so I … |
 | How to make a combo box read only ? N wat is the code to deactivate it ? |
| | [code] //this game is played with a six sided die, on each player's turn he may roll until he gets a 1 from the die, at which point, all points accumulated to that point are wiped, he may hold and add the accumulation to his score at any time. #include<fstream> …  |
| | I've been able to open text files, read them and write to them. However, I always have to specify the name of the file before I compile. IE: ofstream myfile ("example.txt"); I've tried to declare a string, and then use that where the name of the file would nomally be, … |
| | the question is using pointer variable: a)write a program that receives a sorted array of integer.then it will read an integer value and insert that integer value in correct place (using pointer variable) -is it how im write the code right. b)improve the first program code by allowing the program … |
| | I need to use a DropDownList in my application made in VB.Net where I can select multiple values from the List. Please help me out.. thanks |
| | I am writing a simple program to take a user-supplied file, read the contents, and output email addresses found in the file. If the user supplied an invalid path/file name, I want to prompt the user to try again. Right now, everything works properly if the first file name the … |
| | hi, i have designed my clients site, and currently you can login and add a client, i then have a few tables which are policies that are sold to the client. i have created a foreign key between the policy table and the clients table. what i want to do … |
| | I have a datagridview thats bounded to a db and bindingNavigator that has Add/Delete/Save buttons. When I select a row and delete it, the row gets deleted from the datagridview, but when I restart the application, it doesn't get physically deleted from the database. Search suggests putting this code inside … |
| | Ok. So in the following section from my XML document, I have two attributes in the Unit tag. The first, [I]type[/I], and the second [I]uname[/I]. I wish to click, say a button that says "Troop" on it, and the program will search through the XML file and find the entries … |
| | Hi guys, I have a problem using GridBagLayout. I will paste my code here. You can run it. Sorry for the length :) I tried to comment it as much as possible. So there are three panels in this GUI. One left, one right, one south. The problem is only … |
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