Software Development Forum

i can understand it when we want to implement polymorphism in c++ we use virtual functions and function overriding but when we want to implement polymorphism in java then we do not use virtual methods why. in java we use simply reference object that can store the address and use …

I made the famous game Scissors, Paper, Rock as console application. The game runs great ... Now I want to make it a bit more advanced and allow 2 clients/users to play against each other from different locations. I checked few tutorials on sockets and networking, and in them they …

Good Evening Everyone, i am currently facing a problem. I want to append data to an excel file but before that i want to check for duplication records in the excel file before appending. For example, an employee want to check in to a company but he can only check …

good evening everyone... could anyone help me on this? With a "time value", eg. 08:00:00... i want to find the range that this value falls in using case statement... i am not good in using the time format... anyone can help? This is just an example: (the code is not …

Good Morning Everyone, i have a question.... i have 2 text boxes... for text box 1, i want user to enter integer in "hour hour" (24 hours format) for text box 2, i want user to enter integer in "mm" (24 hours format) there is also a label in between …

Hi all, i encounter an syntax error "Syntax Error in Insert Into" when i try to run this code... anyone can assist? Thanks! Dim sConnectionString As String sConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;" & _ "Data Source=H:\Users\Desktop\EmployeeAway2.xlsx;Extended Properties=""Excel 12.0;HDR=YES;""" Dim objConn As New System.Data.OleDb.OleDbConnection(sConnectionString) objConn.Open() Dim objCmd As New System.Data.OleDb.OleDbCommand() objCmd.Connection = objConn …

Having a problem. Wrote program originally as VB Console using Sub procedures, had to change it to Function. It worked as sub procedures, but now as function it won't calculate correctly, I actually have two that are doing the same thing because of the procedure switch! Grr! Any suggestions? Sub …

I am new here and it's my first post, so I'm sorry if this is in the wrong place or is formatted wrong. I made my first Python code, which is extremely simple, but I have a few questions I need clarified: This program asks the user to enter 3 …

It is commanly said that java is architectural neutral what is the basic concept of this.I want brief answer on it and some examples of this.

I am trying to create a runnable jar file .. did a few days ago with a single class and worked fine but now it doesn't seem to be working as good with multiple files .. Here is what I did 1) - create manifest.txt the contense of it is …

I have a block of code that i am wanting to turn into a function and i am very ocnfused on how to do it properly. If anyone could give me a lead on how to do this it would be a great help. The for statement is where i …

I know that in case of virtual inheritance, a vptr is needed to access the base class members, so I looked at a program that involved virtual inheritance but I was amazed at the size of the class. The code is below: #include<iostream> using namespace std; class Base { public: …

Hi Dw I'm not a master in java and I'm kinder new to it even though I can do certain things in java. I'm developing an object oriented project and I've done with the object class now I want to make the device be able to listen and execute the …

It's not really a problem that I am facing, more like looking for explanation ... I had this import java.util.*; import java.io.*; public class ReadFile { private static int lines=0; private static List<String> words=new ArrayList<String>(); private static String fullLine; private static int indexOfSpace; private static String getWord; private static String …

I am having trouble saving dates to my MySQL database (code below) C# var abook = db.egw_addressbook.Local.FirstOrDefault(o => o.contact_id == 16875); abook.org_name = mvm.org_name; abook.hex_srv_start = mvm.hex_srv_start; db.SaveChanges(); MessageBox.Show("Saved"); XAML <DatePicker x:Name="Txthex_srv_start" SelectedDate="{Binding hex_srv_start}" HorizontalAlignment="Left" Height="26" Margin="10,55,0,0" VerticalAlignment="Top" Width="111" /> If I make any changes to the date, I get …

I have two classes that I am compiling from command line. One is Vehicle class, class Vehicle{ int passangers; int fuelcap; int mpg; } and another is VehicleDemo class. This class instantiate an object of Vehicle class. class VehicleDemo{ public static void main(String args[]){ Vehicle minivan = new Vehicle(); int …

I do not know what seems the problem in my code. I want to add the data to my database (using windows form) but whenever I refresh my database, no updates were observed. Thank you for your help. Here is my code: public void btnSave_Click(object sender, EventArgs e) { string …

Hey, i'm recently new in this forum, so if i'm doing something wrong, please tell me! I have a problem that is driving me nuts! Here's the thing, i want to know if there is any way of remove checkboxes dynamically, with code. I know that there is a way …

the program is about Blob<T>, where shared_ptr<std::vector<T> > as its data members. be noted that the real problem here is about shared_ptr of my own version (simple one) but atleast (should) worked with the Blob<T>, which is the std::shared_ptr did, but not with mine. [Error Msg](http://postimg.org/image/krwflmyhx/) the error msg above …

hi i can't undestanding this why the main function in java is static and static function can call using class name. And why we declare main function as public. i can not understanding this procedure of main function in java. plz help me.

A few days ago, i made a hangman game and I really want to complete it in any aspect. One of my ideas now is to "import" words from a file. Currently what I have is an Array of Strings (just a few words inside for testing) and what I …

Hi all, I had a little problem when deploying an application having crystal reports as a reporting tool on a client pc. It works so well in my dev pc even installed.Since i'm using Access 2007 i used Microsoft.ACE.OLEDB.12.0 provider. I haven't provided any password or username for the database.But …

Hi everyone, can i check with you, if i want to compare time... how can i do that... i have the following code time_One = Now el_Time = time_One - time_Two Label1.Text = Now.ToShortTimeString If Label1.Text < "06:30:00 PM" Then Label1.Text = "-----" Else Label1.Text = el_Time.ToString End If I …

So, I've gotten myself in a bit of a pickle. I have been serializing data I collect with: vector<myClass> mVec; ... // mVec is filled with the data to collect for (auto it = mVec.begin(); it != mVec.end(); ++it) { myfile.write(reinterpret_cast<char*>(&(*it)), sizeof(*it)); } I've wrapped this code in a templated …

[program error](http://s11.postimg.org/okbmkhwkj/Untitled.png) this code, which is directly copypaste from the book itself, is appended to Blob.h., producing the above error. template <class> struct std::hash; class Sales_data { friend struct std::hash<Sales_data>; // other members }; // specialization namespace std{ template <> struct hash<Sales_data> { typedef size_t result_type; typedef Sales_data argument_type; size_t …

My code is to open a window.(SDK)(dev c++, orwell) Instead of five seconds it takes a few milliseconds. Please help solve the problem. Just few day ago it worked but now ti does'nt. #include "SDL.h" //cool graphics API. Only works with 32 bit for me. #include <stdio.h> typedef struct // …

Hello, I am a School Boy and a bit new to vb.net 2008. I want to know about Class Form and Class Diagram in simple language. Can Anyone Help me Please? Thanks in Advance

please tell me in how many ways OBJECT ORIENTED PROGRAMMING is different from procedural programming in JAVA

Hey guys! So I'm writing a code that takes 10 numbers from the user which is stored in a array. The user then inputs the problem number (1 or 2) depending on what they want to do to the array. Unfortunately, I'm getting and error on line `array[i].prob1(); `.. Here's …

Hi, I jus want to ask why is it that the pacman will move but it will get larger when it is painted..also is that the proper way to draw?. here is the code import javax.swing.*; import java.awt.*; public class Mypacman extends JFrame implements Runnable{ int x; public Mypacman(){ setVisible(true); …

I need to copy modified data that is stored in an char* to another char* but I get an access violation error. Here is the code int EncryptData(char *data_source, char *data_cipher, size_t sizeofdata) { char *tmp_data; long long int digit; tmp_data = new char[sizeofdata]; /* Do some calculations here with …

Why am I getting the above error message when I run this program? I'm running this program with an mp3 file as an argument, the mp3 file is in the same directory as the python program. There are 30 space reserved for the Title at positoin 125 from the end …

How can I keep track of the unguessed letters yet in my JTextArea? In the non gui version I used an arraylist, worked fine but should I leave the arraylist and use it to track unguessed caracters ? The method is still console based, just started implementing the gui made …

I was wondering something, I know that on windows you can't interact directly with the hardware, you have to use the system API. Now in Linux in the other hand, it looks to me if this can actually be done, or am I wrong? The thing reason why I say …

Im working on a small block of code that compares a argumented value to a file seached value. Every time i run the code it and give it the argumented value either lower or higher than i know the searched value is it gives me the opisite answer of what …

I am trying to export the current record in my app into a PDF. My current code (shown below) is exporting into Crystal Report and then into PDF format but it is exporting ALL records in the database. This program is used for entering in Purchase Requests. Each record in …

OK, I have been experimenting around with GridBagLayout and I'm getting the hang of it. Things are looking the way I want them to on the INITIAL drawing of the GUI. However, when I RESIZE the JFrame to make it smaller vertically, at a certain point, the proportions get skewed. …

I searched daniweb for related questions and google but i canot seem to find my problem in my code When I try to search for a word that exists in my list it returns false This is my code def main(): #the word that I am looking for word = …

I'm trying to create a .txt reader and inserting the read data to the cleansheets software we are editing in class but instead of putting the correct data it does nothing. I made some prints and this is what I obtain: D:\Documentos\Desktop\ImportTest.txt cacacaca ----- [[Ljava.lang.String;@73a175] cacacaca ----- [[Ljava.lang.String;@73a175, [Ljava.lang.String;@364cf2] cacacaca …

i can not understanding the error of this program interface Test { void show(); void input(); void square(); } class Run implements Test { int a,b,c; void show() { System.out.println("a = " + a); System.out.println("b = " + b); System.out.println("c = " + c); } void input() { a=2; b=3; …

Does anyone use boost program_options? What I'm trying to do is this: [code] --Files 1.jpg 2.jpg 3.jpg [/code] The only thing I know how to do is [code] --File1 1.jpg --File2 2.jpg --File3 3.jpg [/code] Does anyone know how to do this, and maybe store them in a vector<string>? Thanks, …

Well, the title says it all. Imagine that I have HelloWorld.java , I want to create an executable jar from it. I know that if I use IDE such as eclipse I can create it there but how can you create it without that?

I am a bit new to vb.net. I Want to make a custom shaped button in vb.net 2008 professional Edition. I Want to make it by Design and not by Code. Can Anyone Help me Please? Thanks.

This is an assignment given to me with the worst possible book for this class. Basically, i need this code to add the row and col of the user input. i know it is missing the row portion, but currently, the col addition is summing everything together twice and i …

I created an app to view and tag all of my home movie files. To play back the video I embedded Windows Media Player in the form. It also allows me to add comments to videos and search based on the comments. While it is functional, I would prefer to …

I'm trying to create a code that gives the factorial for a number given. If it is negative, string, or to large of a number an error should return. I figured out how to do the catch for the negative and string, but I'm confused on how to create a …

i'm trying call the WM_DRAWITEM message from WM_KEYUP message without sucess :( bool KeyPressed(int a) { if(GetAsyncKeyState(a)) { return true; } else { return false; } } //in WM_KEYUP message if(KeyPressed(VK_MENU)==true) SendMessage(hButton, WM_DRAWITEM,NULL,NULL); what i'm doing wrong with SendMessage?

i have a problem with code below import javax.swing.*; class HelloWorld { public static void main(String x[]) { JOptionPane.showMessageDilog(null,"Welcome","Bscs",1); } } i try my best but i can not understand the following error HelloWorld.java:5: error: cannot find symbol JOptionPane.showMessageDiloge(null,"Welcome","Bscs",1); ^ symbol: method showMessageDiloge(<null>,String,String,int) location: class JOptionPane 1 error plz help …

Hay guys iam new to c programming and i was trying to do simple do you want to continue loop using do while loop the problem is the program doesn't read the char Y/N and just simply contiune the loop and here is the code what's wrong #include <stdio.h> #include …

Hi, I have 3 tables Description, Item, Transaction Description Item Transaction DeID Name IID Name DeID TranNo Type IID Date 1 Printer 1 Stylus T10 1 1 Repair 1 2 Monitor 2 HP 1 2 Repair 3 3 ViewSonic 2 I need to count how many printers, Monitors etc. are …