Ascii problem

[eekhoorn12]

Hey

I have a problem with a program i am trying to create. For the program i need to read a file and convert what i read to ascii codes so i can manipulate it. I have suceded into reading the file and converting a part of the data to ascii values but at some characters i get 0 values. The file i test it with is a file i created with a hex editer in which i typed al the hex values from 0 to FF. The problem lies in the extended ascii characters. I have attached my test file i is a simple file with no extension.

Here is the code i use:

#include <QApplication>
#include <QtGui>
#include "yenc.h"
 
Yenc::Yenc(QWidget *parent)
    : QDialog(parent)
{
 
	QPushButton *connect = new QPushButton("Hello Qt!");
	QPushButton *list = new QPushButton("Hello Qt!");
	lineEdit = new QLineEdit;
    textbox = new QTextEdit("test");
 
    QObject::connect(connect, SIGNAL(clicked()), this, SLOT(buttonClicked()));
    QObject::connect(list, SIGNAL(clicked()), this, SLOT(textboxClear()));
 
	QHBoxLayout *layout = new QHBoxLayout;
 
    layout->addWidget(connect);
    layout->addWidget(list);
    layout->addWidget(lineEdit);
    layout->addWidget(textbox);
    setLayout(layout);
    setWindowTitle(tr("Test"));
}
 
int Yenc::buttonClicked()
{
	QString readstring;
	qint64 asciival;
 
	QFile file(lineEdit->text());
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        return 0;
    }
 
    QTextStream out(&file);
 
    while(!out.atEnd())
    {
    	readstring = out.read(1);
    	asciival = readstring.at(0).toAscii();
 
		if(asciival < 0)
		{
			asciival = asciival + 256;
		}
 
    	textbox->append(QString::number(asciival));
	}
}
 
int Yenc::textboxClear()
{
	textbox->clear();
}

#include <QApplication>
#include <QtGui>
#include "yenc.h"

Yenc::Yenc(QWidget *parent)
    : QDialog(parent)
{
      
	QPushButton *connect = new QPushButton("Hello Qt!");
	QPushButton *list = new QPushButton("Hello Qt!");
	lineEdit = new QLineEdit;
    textbox = new QTextEdit("test");
    
    QObject::connect(connect, SIGNAL(clicked()), this, SLOT(buttonClicked()));
    QObject::connect(list, SIGNAL(clicked()), this, SLOT(textboxClear()));
   
	QHBoxLayout *layout = new QHBoxLayout;
	
    layout->addWidget(connect);
    layout->addWidget(list);
    layout->addWidget(lineEdit);
    layout->addWidget(textbox);
    setLayout(layout);
    setWindowTitle(tr("Test"));
}

int Yenc::buttonClicked()
{
	QString readstring;
	qint64 asciival;
	
	QFile file(lineEdit->text());
    if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        return 0;
    }
    
    QTextStream out(&file);
    
    while(!out.atEnd())
    {
    	readstring = out.read(1);
    	asciival = readstring.at(0).toAscii();
		
		if(asciival < 0)
		{
			asciival = asciival + 256;
		}
    
    	textbox->append(QString::number(asciival));
	}
}

int Yenc::textboxClear()
{
	textbox->clear();
}

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Hope someone can help me

Thanks
Marcel