Software Development Forum

good day guys. i was studying a particular block of code and came across an operator: ->. im not exactly sure what it does. i found some notes saying that ptr-> is equivalent to(*ptr). for the life of me i just cant see how that applies here. care to help? …

Hello. im having a little problem with file inclusion. im getting the following errors: error LNK2005: "long * addresses" (?addresses@@3PAJA) already defined in rere.obj fatal error LNK1169: one or more multiply defined symbols found My 3 files are as follows: mainFile.c [CODE]//Program for a singly-linked list #include "def.h" #include<stdio.h> #include<stdlib.h> …

The task is to use a recursive algorithm to determine the sum of two numbers n1 and n2. I just keep on returning to using the formula n1*n1 +n2*n2 The part which I have questions is I don't get how to do this in a recursive way. Thanks!

Alright, here's a problem I can't seem to figure out. I'm very new at all this, so hopefully this problem isn't too ridiculous. Basically the gist of it is in a program I made for a class; it wouldn't let the input for the cin.getline be typed unless I put …

I'm trying to read one line at a time from a .txt using FileInputStream. [code=Java] FileInputStream in = null; // Open an input stream in = new FileInputStream("out.txt"); int c; while ( (c = in.read() )!= -1 ) textArea2.append(new DataInputStream(in).readLine() ); in.close(); [/code] For this out.txt: [code=java] abc abc lalala …

[CODE][/CODE]ok this code has a few quirks that is annoying me the only part that does not straight up work is the Add a show i have a problem in increasing the size of the array. there is also the issue of couting two zeros for the minutes of the …

hello guys can u help me with code. Everytime i run the program and update the data in database. I got the error in this code [CODE]da.Update(ds, "reservationdata")[/CODE] [CODE] Dim dt As DataTable = ds.Tables("reservationdata") If resno.Text = "" Or custname.Text = "" Or custaddress.Text = "" Or TextBox1.Text = …

Hello, I have a jTextArea I want to use as an accounts panel by an administrator. The admin can append user + " " + password + " \n" to the jTextArea (one line per user + password). When someone tries to log in, the idea is to iterate through …

I downloaded data from google.com/favicon.ico and saved it in a file "icon.png" using the following: [CODE]URL url=new URL("http://www.google.com/favicon.ico"); InputStream ss=url.openStream(); byte bytes[]=new byte[100000]; int offset = 0; int numRead = 0; while (offset < bytes.length && (numRead=ss.read(bytes, offset, bytes.length-offset)) >= 0) { offset += numRead; } FileOutputStream out=new FileOutputStream("icon.png"); out.write(bytes);[/CODE] …

i want to retrieve images from access database and display in grid layout. i have displayed 1 image successfully but how can i do this for all images together.i have stored images as BLOB

This code generates all permutations of the numbers 0, 1, 2,...., n-1. I am trying to get it to use recursion to do this. I am not compiling. I do not show errors, but I am not getting it to work. Can anyone see where I am going wrong? [CODE]import …

Question: Each year the HSE Unit receives accident count reports from a 10 departments across the university. To summarize these reports, the department provides a frequency distribution printout that gives the number of departments reporting accident counts in the following ranges: 0 - 19 20 - 39 40 - 59 …

Hi all I am a beginner programmer, and I think I might have bitten off more than I can chew.I've done some small projects, and then decided to do a simple banking app, just as a learning exercise. Problem is I don't know where to begin, and I've not created …

Hi, Need help to know, how to diaplay a count down timer in the dialog box using MFC. and when the timer ends the dialog should colse........ Please provide suggestion......

i created a program in c# with database sql server 2005.it worked in windows xp.but i don't know how to install my software in windows 7 .i coudn't install sql server2005 or sql servr 2005 64 bit in windows 7. help me plz ..very urgent

I think i have the function for mean but i also need to figure out below mean. This what i have so far.[CODE]import math def mean(alist): belowMean = alist mean = sum(alist) / len(alist) if mean <= alist: belowMean = item return belowMean [/CODE]

For my assignment this week, I was supposed to create a program that would read in names from a file, sort them, then output the names sorted. I attempted to do it as a insertion sort, and seemed to have failed miserably... if anybody could point me in the right …

the program is running well but concept is wrong. you should find number 0-100 until 10 trials. if failed, and want to play again unfortunately program is terminated why ? [CODE]#include <cstdlib> #include <iostream> #include <windows.h> using namespace std; int sayiturev (int aralik) // generating number 1-100 { srand(GetTickCount()); int …

Hi all, I'm trying to implement K-means on a database.I have a table like this: The main task is to group id's and return them based on similarity in intensities depending on the number of clusters that the user want to see them. [CODE]id I1 I2 I3 I4 I5 1 …

I have two constructors that are pretty much exactly the same except that one also takes in a boolean value. I want the constructor with four parameters to the call the other one in order to get the the first three. Here is what I have so far. [CODE] public …

I have a java app that used to use a property and I am not sure with the changes I've made to the class path how to find the driver. I thought I was using the exact same installation but I can't find the driver. Can someone please tell my …

[CODE]import java.io.*; public class EnumEx3 { /** * @param args */ public static void main(String[] args) { Fishs fishs=Fishs.AMNON; System.out.println(fishs.getX()); } } enum Fishs { BURI(20), AMNON(50); private int x; private Fishs(int x) { this.x=x; } public int getX() { return x; } } [/CODE] i have that code and …

I'm trying to write a matrix multiplication program that takes in an int N on command line, creates two NxN matrices A & B, randomly populates them with ints, and then computes the result of multiplying A and B. I wanted to avoid malloc, but the first version started segfaulting …

Hi, guys I'm having trouble writing this word count program in python3. I've been able to find alot of help for past versions but nothing for 3. It is just a simple word count program, with a user input sentence. So far I have [CODE] def main(): print ("This program …

Hello daniweb! i have recently started to learn c++ and have made a few programs, (a hello world and a multiplication program) following some tutorials. So i decided to try and make my own, but it did not go well. After debugging in microsoft visual c++ 2010 i got loads …

Hello, When I open my app an XML doc is created with several elements giving to each of them the value 0. After the XML is created I want that several labels on the form to change their text to spcific elements' values (in this case 0). Is there any …

SinglyList.h [CODE] #ifndef SINGLYLIST_H #define SINGLYLIST_H #include <iostream> #include <string> using namespace std; class Exception { private: string errMsg; public: Exception(const string& err) { errMsg = err; } }; class InvalidPositionException : public Exception { public: InvalidPositionException(const string& err) : Exception(err){} }; class EmptyException : public Exception { public: EmptyException(const …

Good morning all. I'm having some difficulty in reading from a sequential file. I think I have my code set up properly, but when ran, it throws an exception which show me the error statement I specified. When I ran a debug, it does seem to be pulling the information …

I have written this program but for some reason it isn't appending to the file? import java.io.*; public class numbers { public static void main(String[] args) throws IOException { FileWriter grades = new FileWriter(new File("grades.txt")); String temp = ""; for (int i=0; i<=100; i+=2) { temp = String.valueOf(i); grades.write(temp); grades.write(","); …

I am attempting to make a class called Profile and have numerous profiles in an array (70 to be exact). [CODE]//profile.h Class Profile { int _age; string _fname; string _lname; int _height; char _gender; Profile(int val, char gender) : _age(val), _gender(gender) { } int getHeight(); int getAge(); }; [/CODE] [CODE]//profile.cpp …

I have looked around and it seems that there are no comprehensive tutorials on integrating LUA into a C++ application. What exact files must i have/include/link etc? Most tutorials don't describe this in any detail and i am left wondering what i need where.

Any1 know how 2 update data in a DataEnvironment? I tried to search throught the net but unable to get solution to my problem. Please guide me with some simply code. Thx in advance.

Can anyone please explain why a self reference on a structure is allowed, but not a variable of that type? This is what i mean: [CODE] struct node{ int a; struct node *n1; }; /* This is allowed */[/CODE] [CODE]struct node { int a; struct node n1; }; /* But …

[CODE]#include <iostream> #include <fstream> #include <cstdlib> #include <conio.h> #include <iomanip> #include <ctype.h> #include <windows.h> #include <cstring> #include <ctime> using namespace std; int main() { ofstream outputparticulars("particulars.txt",ios::out); int d,a,b,c; char ic[100],password[100],confirmpassword[100]; char info[6][101]; cin>>d; if(d==1) {cout<<"1"<<endl; } else if(d==3) { cout<<" Key in your......\n"; cout<<" First Name : "; cin.getline(info[0],100); outputparticulars<<" …

Hi I have an array which contains a number and string in each element - itemClass.itemID and itemClass.itemName. the two combined making up an inventory I am trying to build a function which uses a for loop to take each itemID and concatenate them all together to produce a string …

Hi. I have one silly problem. I'm trying to read from file with [iCODE]ReadFile.read(ReadBuff, 1);[/iCODE] char by char and i need to convert them to ascii code. With normal ascii symbols it's all right. But them i'm trying to convert extended ascii symobl to ascii code it gives me negative …

i wanted to do like this. can anyone help? [ATTACH]17495[/ATTACH] [ATTACH]17496[/ATTACH]

I have a program that displays a website using system.windows.forms.webbrowser. It runs off files located on the computer, just html files that are not on the web. All i would need to do is link to the index page and then you can access everything. The purpose of it is …

Hi guys! I have a JTable updated from MySQL. I can successfully insert a row in JTable using SQL statement "insert into...". However, when I execute a delete statement, then JTable is not updated. Please, help me to find an error. [CODE] public void actionPerformed(java.awt.event.ActionEvent evt) { SystClasses.FilterClass.tableModel.initDB("85.254.219.164", "employee_record", "liana", …

i already post this topic in the programmingforums.org..a sister site of daniwebs. i think that this site is more populated.. i exploring deep programming, and i would like to have good start.. i want to determine the parts of this code, and how it works.. i think this is very …

Hi i am currently working on a project i got a problem from few days. Problem is that it is giving System.NullReferenceException in output.Can any one able to remove it by editing the code. The source code is [CODE]using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; …

Hi to all I'm developing an application using C#.net .My problem is I have two forms Form1 and Form2... I have a combo box in Form1 with values Admin , student and others....Form1 is used as login form . If login by student i want to hide certain buttons and …

hello guys, I have a problem with my code first is i have two combobox named facname.text(facility name) and facno.text(facility no.) and when I choose in facility name(facname.text), in the facility no.(facno.text) should display the number of facility in that particular facility name..For Example you 2 facility for bowling and …

Any suggestions on the best online tutorial/ebook/printed book regarding C libraries and latest c std? I would like to get more coverage on FILE I/O s Thanks in advance

Hi, I have a problem with an VB aplication programmed in Visual studio 2005. Recently i was upgraded my computer with windows XP to Windows 7 Ultimate (fresh instalation). After that I made reinstallation Visual studio 2005 and service pack 1 for Vista/win7. My problem now is when I run …

Hi i'm writing a program that reads records from a file, then sorts these records by the person's firstname, and stores the sorted data in a new file. Heres the code: Everything works fine, except it stores garbage at the end of the last record. If i set the array …

hi, Below is my code for DELETE button. What i want is if the user select the transaction from the listview and press the DELETE button it must be able to delete the transaction from listview and text file(temporary log file) which i keep all the transaction record. At the …

[CODE] #include<stdio.h> int main() { FILE *point; char others[35]; int indexer,count; strcpy(others,"Additional lines."); point = fopen("tenlines.txt","a"); /* open for appending */ for (count = 1;count <= 10;count++) { for (indexer = 0;others[indexer];indexer++) { putc(others[indexer],point); /* output a single character */ putc('\n',point); /* output a linefeed */ } } fclose(point); getchar(); …

The following code swaps values between 2 variables without using a temp variable..... i want to know the logic behind this [CODE] //#include "stdafx.h" #include<stdio.h> int main(){ int a =3, b=5; a^=b^=a^=b; printf("%d" "\n" "%d",a,b); return 0; }[/CODE] [CODE]Output 5 3 [/CODE]

Hello! Can someone please suggest a way to effectively copy the bytes from one array to another. In my program a user will call the method setDate(byte[] buf) which will set data continuously ie inside the method there is an array say buf2. for example if the method is called …