DaniWeb IT Discussion Community - Software Development

Java and embedded devices

Acidburn — Sun, 06 Jul 2008 21:14:09 GMT

Hey guys,

Most embedded devices suc as the Amtel boards seen to require C / C++ programming, why don't they support Java? Is it question of performance? Or am I overlooking something?

help with syntax commands

leegeorg07 — Sun, 06 Jul 2008 18:58:05 GMT

im quite new to python and have made a few programs to help me in school but i dont know how to compile them.
i have found a tutorial and have copied the code correctly but python says that the 'import' syntax is incorrect.

this is the code:

from distutils.core import setup import py2exe



setup(console=['2.py'])

how could i fix this?

Trying to create a class

Clockowl — Sun, 06 Jul 2008 18:50:25 GMT

Hey guys,

I come over from C, wanting to learn C++. I have a nice little book but figured I could use a project to get me going.

So I magicly crafted code, and ran into this problem:

C:\Code\Rapture\World.h|7|error: ISO C++ forbids declaration of `Breeture' with no type|

With this code:

Breeture.h:

#ifndef BREETUREH
#define BREETUREH
 
#include 
#include "World.h"
class Breeture{
    friend class World;
 
    public:
    //Creates the breeture
    Breeture();
 
    //Pwns the breeture.
    void Die();
    ~Breeture();
 
    void Age();
 
    void outputDNA();
    void outputAge();
 
    void outputData();
 
    private:
    bool alive;
    unsigned int number;
 
    unsigned int age;
    unsigned int DNA[2];
    unsigned int causeofdeath;
 
    unsigned int kids;
 
    unsigned int deathChance;
 
    vector<*Breeture> parents;
    vector<*Breeture> children;
    vector<*Breeture> partners;
};
#endif

World.h:

#ifndef WORLDH
#define WORLDH
#include 
#include "Breeture.h"
class World{
    public:
    void NewBreeture(const Breeture *const baby);
    void BaiBreeture(const Breeture *const deceased);
 
    /*This function ages all living breetures*/
    void AgeBreetures();
 
    /*Does a death-check. World makes Breetures die.*/
    void DeathCheck();
 
    /*World also makes breetures mate.*/
    void BirthCheck();
 
    //int StoreFamilyTree(string *location);
 
    private:
    unsigned int worldPopulation;
    unsigned int totalBreetures;
 
 
    /* And...
       The oldest breeture
       The breeture with the most direct-offspring*/
    Breeture oldest;
    Breeture mostChildren;
 
    /*Holds a vector of living creatures, for speedy aging*/
    vector<*Breeture> livingBreetures;
 
    /*Holds a tree of vector describing parent/child relationships*/
    vector<*Breeture> familyTree;
    */
};
#endif

Why doesn't World.h know about the breeture class?

Thanks in advance,
Nick

Make EasyIn class accessible?

HLA91 — Sun, 06 Jul 2008 18:45:47 GMT

Hey all

I recently picked up the book "Java the first semester". It uses the EasyIn class to get user input. I have downloaded the file EasyIn.java but I dont know how to make the class accessible from my programs.

Quote:

As long as the EasyIn class is accessible you can use all the input methods that we have defined in this class

I know I have to put
import EasyIn.*;
at the beginning of my code but in what directory do I put the
EasyIn.java
file so that my program can link to it when it is compiling?

Many thanks

HLA91

Get Last Modified Filename

Shadow14l — Sun, 06 Jul 2008 18:23:02 GMT

I am using this function to download files:

def download(url):
    urllib.urlretrieve(url, url.split("/")[-1])

I am downloading files from a site, but I don't know the EXACT filename... All I know is the id for them...

Example:
download("http://site.com/files/489411/")

When i am to do that, it automatically resolves the appropriate filename and it will download it to my current directory.

It could be "Magics.ext", but I don't know that, all I know is that it (should be) is the last modified file.

=================================================

I need a function that takes nothing and returns the last modified filename for me. It does NOT have to return the directory information with it as well (ex. C:\\shadow\z\d\file.ext).

=================================================

I found a way how to do what I needed!

Here it is, for people with same problem:

import os
 
def getlatestfile():
    files = os.popen (r"dir /od /b *.*").read ().splitlines ()
    # dir /od /a-d /b # to avoid directories
    return files[-1]

Help With Game Engine!

camthalion95 — Sun, 06 Jul 2008 18:15:56 GMT

I want to make an engine similar to Unreal for PC, 360, And PS3. Who Wants to help?

Attached Images

elf.bmp (38.7 KB)

cxGrid row colour Change

cVz — Sun, 06 Jul 2008 18:00:22 GMT

Good day

I'd like to find out how to change the color of a row on a page startup in Delphi 7 pro with an Express Quantum grid 6

What i am trying to achieve is this

if Quantity in stock = >10 row color should be green...
if Quantity in stock = <10 and >5 row color should be Yellow...
if Quantity in stock = >5 row color should be Red..

Any help would be appreciated

Need Your help please

sharravanan — Sun, 06 Jul 2008 17:56:36 GMT

Hai,
Iam designing a software which includes invoicing, as iam new to c# (Or Software Development), i dont know how to design an invoice specially the table view which we use to enter products and rates etc. I dont know what to do. I saw many commercial software's invoices with professional look for entering data's. Is it possible to do that in c# or how. Please help i need to complete my project soon because this is my first project.

By
Sharravanan

Python memory limitations in Windows

arkane — Sun, 06 Jul 2008 16:40:03 GMT

Hello I have written code using python and C extensions which performs object detection on 3D data sets. The code was originally developed under Linux and has since been used under Windows XP where I continuously get MemoryError crashes when assembling a list of 78566400 integers. There is nothing wrong with the code since it runs perfectly under Linux with the exception of using 75% of the available 3.5 Gb of memory. When we get the memory error crash in windows there is still roughly 1.5GB of available memory. My only guess is that Windows will not let a program consume huge amounts of memory??

Any thoughts/suggestions are appreciated.

refreshing datagrid contents

harcaype — Sun, 06 Jul 2008 16:13:57 GMT

I'm trying to update/refresh my data grid but it doesn't seem to update whenever there's a new entry. I've search the net about it and they were talking about databind(). I can't seem to have that in my datagrid. My intellisense only shows DataBindings not databind(). here's my code (when button is clicked):

dataGridRecords.DataSource = null;

            dataGridAlarm.DataSource = null;

            dataGridViolations.DataSource = null;

            dataGridDriverInf.DataSource = null;

            dataGridRecords.DataSource = dbc.ds.Tables["Records"].DefaultView;

            dataGridViolations.DataSource = dbc.ds.Tables["Violations"].DefaultView;

            dataGridDriverInf.DataSource = dbc.ds.Tables["DriverInfo"].DefaultView;

then i also tried this (i've also tried refresh(),refreshedit()):

dataGridRecords.DataSource = null;

            dataGridAlarm.DataSource = null;

            dataGridViolations.DataSource = null;

            dataGridDriverInf.DataSource = null;

            dataGridRecords.Update();

            dataGridViolations.Update();

            dataGridDriverInf.Update();

            dataGridRecords.DataSource = dbc.ds.Tables["Records"].DefaultView;

            dataGridViolations.DataSource = dbc.ds.Tables["Violations"].DefaultView;

            dataGridDriverInf.DataSource = dbc.ds.Tables["DriverInfo"].DefaultView;

can anyone tell me how to get this right? it's not updating.

Function

swingkitty — Sun, 06 Jul 2008 15:17:06 GMT

I have an assignment for my class that asks to modify my previous assignment to include a function for both A and B. The function for A should have the quantity of numbers passed in as a parameter and needs to return the largest number. The function for B should have no parameters and return the smallest number.

Here is some pseudo-code for your greatest function:

int Greatest(int count) 

{

// Initialize final result variable to largest number possible

//

// start a loop, increment from 0 to count 

// Read next number

// Compare number to final result variable

// if number is greater than final result variable, then

// store in final result variable

// end of loop

// return final result

}// end of function greatest



//Here is what I have so far. The application seems to run well without the Void function. I am new to programming, and I am finding it difficult to handle this assignment. I am looking for a clear path of explanation in order to learn.



#include 

using namespace std; 

void smallest();

int main ()



{ 

char choice;

int quantity;

int num1;

int num2;

int largest;

int smallest;

double larger(double x, double y);

double smaller(double x, double y); 

do 

{ 

cout<<"Please choose one of the following options"<
cout<<"A - Find the largest number within a known quatity of numbers"<
cout<<"B - Find the smallest number within an unknown quantity of numbers"<
cout<<"C - Quit"<
cout<<"Please enter your choice: ";

cin>>choice;

cout<
switch (choice)

{

case'a':

case 'A': 

//gave both lower case and capital 'a' to allow for user freedom of choice

cout<<"A - find the largest number within a known quatity of numbers"<
cout<<"How many numbers would you like to use? ";

cin>>quantity;

for(quantity;quantity > 0; quantity--)

{

cout<<"Please enter a number: ";

cin>>largest;

cout<
for(quantity;quantity > 1; quantity--)

{

cout<<"Please enter a number: ";

cin>>num1;

cout<
if(largest<=num1)

largest=num1;

}

}

cout<<"The largest number entered is ("<
break;

case 'b':

case 'B':

//gave both lower case and capital 'b' to allow for user freedom of choice

cout<<"B - Find the smallest number within an unknown quantity of numbers" <
cout<<"Enter your first number: ";

cin>>num2;

cout<
smallest=num2;

cout<<"To get result and return to main menu enter (-999) for your number" <
//used sentinel to allow user to initiate close of process

while (num2 !=-999)

{

cout<<"Please enter another number: ";

cin>>num2;

cout<
if (num2 != -999)

if (num2
smallest=num2;

}//keeps prompting until sentinel is input

cout<<"The smallest number you entered is: (" <
break; 

case'c':

case'C':

//gave both lower case and capital 'c' to allow for user freedom of choice

exit('c');

default:

cout<<"The letter you entered is not valid"<
//this works well in case of user input error during the menu. 

//Does not help with user input error during the different parts of application.

}

if (choice == 'b')

{

cout << "Enter quantity of numbers: ";

cin >> quantity;

count = quantity;

larger (quantity);

} if (choice == 'b')



{

cout << "Enter quantity of numbers: ";

cin >> qty;

count = qty;

larger (qty);

}

}

while(choice !='c');

//end of do while loop 

return 0;

}



double largest (double x, double y)



{

double max = x;

if ( y > max)

max = y;

return max;

}

void smallest()

{

int smallest(int quantity); 

for (count = 1; count > qty; count++)

{

cout << "Enter " << qty << " numbers: ";

cin >> num2;

max = smallet(min, num2);

done = false;

}

cout << "The largest number is: " << min;

}void smallest()

Chat System

jk_bscomp — Sun, 06 Jul 2008 14:19:47 GMT

Hello everyone!!! I just want to ask if is it possible to create a chat program that send and receive message, audio and video for Local Area Network...

I want to create a program similar to yahoo messenger that includes the future of voice and video but the difference is I am doing this program for Local Area Network,,,

Is this possible? If yes, please help me how to do it or give me some sites where i can learn ..
Thank you very much....

Project help

roshantheman — Sun, 06 Jul 2008 14:13:36 GMT

generate a 5-day timetable for a school (multiple classsrooms)
be able to assign students to specific courses to certain rooms/teachers at a specific time interval (without clashing with other classes)
it must use a database as a medium (ODBC)

this is a project that i need some drastic help in it's due on the 23rd of july...

Kindly assist

Any solutions can be sent to this email addy

Java newb w/ code problem

dtfan6 — Sun, 06 Jul 2008 13:13:37 GMT

Hi everyone !

This is my first new post, I have a problem with my Java code. I am trying to make a first applet, and have gotten this code from a book, "Java - An Introduction To Problem Solving & Programming", by Walter Savitch and Frank Carrano :





import javax.swing.JApplet;

import java.awt.Graphics;

public class HappyFace extends JApplet

{

      public void paint(Graphics canvas)

      {

            canvas.drawOval(100, 50, 200, 200);

            canvas.fillOval(155, 100, 10, 20);

            canvas.fillOval(230, 100, 10, 20);

            canvas.drawArc(150, 160, 100, 50, 180, 180);

       }

}

Any ideas why I keep getting an error message coming from NetBeans 5.5.1 that it can't find "HappyFacemain.class" ? Thanks in advance !

-dtfan6

Enum vlues into Combo

veledrom — Sun, 06 Jul 2008 13:12:04 GMT

Hi,
Code below retrieves some of the enum values, not all.
Why?
Thanks

Dim RST As New ADODB.RecordSet

Combo1.Clear

RST.Open "Select Distinct Title From MyTable",Conn

If Not RST.EOF  Then    

RST.MoveFirst   

Do While Not RST.EOF

       Combo1.AddItem RST(0) & ""

       RST.MoveNext

   Loop

End If