Software Development Forum

Hello! I have a little problem. I don't understand how to solve this issue: Object reference not set to an instance of an object. Thank you! This is my code: [code=c#] BindingList<ComboBox> cmbPlayers = new BindingList<ComboBox>(); Club[] league = new Club[10]; // league contains class Club // class Club contains …

Hey guys i m trying to make hangman game as java application here is a simple run how it should be. [url]http://e.atilim.edu.tr/mod/resource/view.php?id=5240[/url] i m trying to put JLabels in order when player click correct buttons. firstly i added JFrames at first then i did setEnabled(false) them after button is clicked …

Does someone know how to integrate a collection of programs as one whole program? Thanks. :)

Hey guys, so this is what happened. I'm stuck on this project on the second part, which is the top right quadrant. Its not showing the graphics at its specified quadrant which is the top right. Its supposed to have randomized sized red blocks that fills the quadrant. Can you …

Here is a complete and working code that 1. Adds the numbers(input) to get a sum(output) 2. Sorts the numbers in a descending order Can you post any suggestions on how I can improve my code :) main.c [CODE]#include <stdio.h> #include "header.h" main (){ int sum, x, y, z,choices; input(&x, …

I want to attach User Instructions to a Java application, and allow the user to open it from the help menuitem. I'm not very familiar with classpath variables. If I use an absolute path name everything is fine, such as File pdfFile = new File("C:/Program Files/MyProgram/UserGuide.pdf"); But I want to …

I'm having troubles with the following code [CODE]#include <stdio.h> #include <ctype.h> int main (void) { int i=0,j=0,row; char str1[5], str2[5]; char machine[4][5]={0}; FILE *fp; fp = fopen("text.txt","r"); while (fscanf(fp,"%s %s",&str1,&str2) == 2 ) { row = str1[1]; while (str2[i] != NULL) { machine[row][i]=str2[i]; i++; } } for (i=0;i<5;i++) for (j=0;j<5;j++) …

i have problem about the output in this code, my output so only the index 0. how can i fix this. [code] public class d_2D { static double[][] d =new double[6][4]; static double[][] e= {{}, {0.0,0.6,0.0,0.0}, {0.0,0.2,0.5,0.1}, {0.0,0.2,0.5,0.4}, {0.0,0.2,0.5,0.7}, {0.0,0.0,0.0,0.9}}; static double[] avg= new double[4]; static double[] sum= new double[4]; …

i need to insert a character on a string . for example input is : cafe the output should be caxzfe . i insert xz . i just know how to concatenate two strings but when inserting a character in a string im totally lost .

hey guys, I'm writing a program and trying to output data to a file and I'm getting this error: 1>------ Build started: Project: GenericProgram, Configuration: Debug Win32 ------ 1> Source1.cpp 1>c:\program files (x86)\microsoft visual studio 10.0\vc\include\fstream(1116): error C2248: 'std::basic_ios<_Elem,_Traits>::basic_ios' : cannot access private member declared in class 'std::basic_ios<_Elem,_Traits>' 1> with …

Question: Write a single statement that chooses a random number from each of the following sets: a) 2,4,6,8,10 b) 3,5,7,9,11 c) 6,10,14,18,22 I wrote the following statement for the set (a): [CODE](1 + (rand() % 5)) * 2;[/CODE] but I am unable to write ones for sets (b) and (c). …

Hey! I'm currently at the end of a task im working on, which consist of a class named CD, and in the main program i got a method which register a CD. And i want the created class to be named CD1, CD2 etc. [CODE] public static int cdNumber = …

hi every body i m doing project of hand gestures detection using open cv .so pls guide me how i detect hand from video .

Here is my problem: 1) I have a tree which I want to act upon some branches indepedantly and simultaneously by different threads 2) The program is structured so that the processing of each branch is isolated after the main "manager" thread delegates the work to different thread: memory of …

Hi. I have trouble with getting the following program to convert string to float type. What i need to do is this: 12.345e3 = 12345 12e-2=0.12 -12.34=-12.34 -12.34e3=-12340 -12.34e-2=-0.1234 e: = x 10^ I got it to do the basics. However, It doesn't work in case of negative numbers or …

hello my dear friends I have read a book that was simple to learn c++,recently But in operator ovorloading threads ,I dont underestand many example for ovoreloading in another books & booklets for example : in the example below 1 // Fig. 11.3: PhoneNumber.h 2 // PhoneNumber class definition 3 …

How do I define a function that reads a sequence of values from an input stream that is passed as an argument?

Hello everyone and thanks in advance for helping me. I'm a 1st year java student in my first semester of college. Its comming towards the end of the semester and finals are starting up.. well my problem is that my java teacher decided to give us 2 projects to work …

can anyone tell how to bring Bitmap class in java just like we do that in C#................ i've got link regarding the Bitmap class in java... but i does'nt know how to bring that in java [URL="http://jwx.sourceforge.net/api/wx/Bitmap.html"]http://jwx.sourceforge.net/api/wx/Bitmap.html[/URL]

i want to convert a file from text format to binary format using VB how can i achieve this

So I wrote up a simple voting GUI, but I havent been able to figure out how to get it to display the current leader or how many votes they have. It displays the total number of votes correctly, however. Heres my code [CODE]import java.awt.*; import java.util.*; import java.awt.event.*; import …

Hey everybody, I am still pretty new to programming. I am not getting a compiler error here, but I can't figure out what the problem is. I get the message "an unhandled win32 exception occured [1576]" It seems like some type of overflow in the insertion_sort function. I am still …

I'm trying to solve this exercise. Write a program that print out the following, user will input the top number: ***** **** *** ** * i made a program similary to this , but user inputs the bottom number ,the output is like this: * ** *** **** ***** here …

hope anyone can help something with this code, well this code for the exercise 3.4 in Accelerated C++ book... where 3-4. Write a program to report the length of the longest and shortest string in its input. I thought my code was gonna going good, but it seems that it …

Hello, I am trying to add integers to a two dimensional vector. My problem is on line 26. I know this is how you would add the data to an array, but how do you do this for a vector? Also, is it true you cannot pass an array to …

Hi there, I'm trying to create a complex number class in c++ and have hit a snag. I have searched the forums here for an answer and have tried to google it, but still wasnt able to figure out what is wrong. I am fairly new to C++ so yeah. …

Having a little trouble with this problem. Keep getting a compiler error which says there is no match for my operators when I run the test program Create a class called Rational for performing arithmetic with fractions. Write a driver program to test your class. Use integer variables to represent …

Ok So Im writing a app which would pick the 'cheapest' plan for a consumer. While writing this I came across something puzzling to me. Why is it starting after the default constructor, the first CellPlan has three arguments passed too it and then the next one two and then …

#include<IOSTREAM.h> main() { int rohan=0; int m=10; int l=10; int t=10; int flag1 =0; int flag=0; int temp; float temp1; long double n; double k; cout<<"ENTER N\n"; cin>>n; k=n; int camp; camp=k; while (flag1) { l*=10; camp/t; t*=10; if (camp == 0) {flag1=1;} } if ((1>n)&&(n>=1e6)) {cout<<"there is a error";} …

I am having problems with a simple file I am trying to create. The idea of the file is to use a header to read something from the file and then call this in the main.cpp This is my Main.cpp file: [code] #include <iostream> #include <string> #include "Menu_Screen.h" using namespace …

I've been asked to write a program that computes the nth Fibonacci number where n is a value input by the user. For example, if n = 6, then the result is 8. This is what I have so far: def main(): print "This program will compute nth Fibonacci" print …

i am getting an error : java:10: error: AniWorld is not abstract and does not override abstract method mouseMoved(MouseEvent) in MouseMotionListener public class AniWorld extends Applet implements MouseMotionListener, MouseListener please help [CODE]import java.awt.*; import java.lang.*; import java.applet.*; import java.net.*; import java.net.MalformedURLException; import java.applet.Applet.*; import java.io.IOException; import java.awt.event.*; public class AniWorld …

I need help with a programing assignment for my CS 2 class, the task is to check rather a user inputted string is a palindrome meaning it is the same forwards as it is backwards. I have most of the program working, I input a string then copy it and …

I am having a problem with my program not reading the OR statements right. [CODE] do { blah blah blah }while(y!=1||y!=2); [/CODE] I have also used it as this format, ((y!=1)||(y!=2)) The program is marking it as true and keeping me stuck the loop even though y is == 1 …

What i need it to is write a GUI program that has one text field, one button, and one text area. The user can enter data into the text field, and then click the button. When the button is clicked, the program records the value in the text field to …

I have to do this project in which several employees need to be added to the system. The system admin should be able to allocate jobs that each of those employees will be doing after verifying whether that job is already attached to the employee or not and whether that …

Hi,I was wondering how to read and write strings in python. I have this code where I'm creating a path, but its a string, and now I want to write to this string. But keep getting this error message [I]AttributeError: 'str' object has no attribute 'write'[/I] I was thinking about …

Hey, I'm new to Python programming and I've been making a simple rock paper scissors program for practice. I've managed to get it working; it asks the player to enter 'a' for rock, 'b' for scissors or 'c' for paper. If the player entered a, b or c, a number …

My assignment is to basically design a set class that creates a "set" of any data type and is able to perform basic functions. It needs to use an array to store it's elements and operate like a C++ set, meaning no duplicates. I need to be able to add …

hello everyone, can anyone suggest me any software that is portable in pen-drive and c++ program can run in pen-drive.

I have the following program to reduce rational numbers but am getting error messages at the lines x = c.subtraction( d ); and for multiplication, addition and division that says no operator "=" matches these operands. I do not know why. Could someone please help? [code] class Rational { private: …

I'm trying to create a program that'll read a list from an external file, and generate an arrayList with the object representation of the list. Basically, the list contains names, and prices, which will be read in, and used to create instances of my "book" class which are supposed to …

My professor wants the following: 1. Write a program to correct a text including several paragraphs a. The first line in each paragraph must be indented b. The first character in every sentence must be capitalized, paragraphs will be indented with "CRLF" code c. Initial text and output must be …

how do i store the data from the partData file and find if the order was successful?????? is this program correct???????? #include <stdio.h> #include <stdlib.h> #define MaxWordSize 1000 /*Part Number = PartNume Selling Price = SP Quantity in stock = QtyInStock Order Number = OrderNum Quantity requested = QtyRequested partData …

Hi All, I am currently creating a merging program which is processing multiple text files with header. I've manage to merge the text files but I'm stucked with the header that needs computation. path of input files and header explanation: [URL="http://uppit.com/a0nv880qb5uu/text_files_and_explanations.zip"]Input Files[/URL] After merging, I need to put back the …

I am trying to use a combo box to change the background color. I have the following code but it is not working correctly. The combo box is there with the three choices but the choices are not changing the color of the background. [code] import java.awt.BorderLayout; import java.awt.Color; import …

I want to make a table like this: Seq. Name Class Seat VIP? Mileage(km) ==== =============== ===== ==== ====== ========== 1. Peter B 5A VIP 1046km 2. David F 1A VIP 2150km ...... Do I need to use for loop, strncpy to do so? Or do I need to use …

i need to use function but i think my card value and calculate hand functions are not working right. not sure what to do. [code] #include <iostream> using namespace std; void instructions ( ); void input (int& number_of_cards, char& card_value1, char& card_value2, char& card_value3, char& card_value4, char& card_value5); int calculate_hand …

Please help me fix my code.. It works in CodeBlocks but when I try in Linux, it says it has an error - SEGMENTATION FAULT (core dumped) :( This program converts between bases of a number. After it converts a number it should go back to start to get input …

Hi, in the below given program the answer is 1. agpur 2. jabalpur 3. jabalpur I understood the processing for the first two printf statements but for the last printf statement I could not understand the processing. Could anyone please explain. Thanks in advance :) [code=c]#include<stdio.h> #include<conio.h> void main() { …