The Horner Scheme

- User documentation -

Content:

1. Introduction

2. The user interface

3. How to convert

4. The functions

5. Requirements for Horner Application

6. Contact

1. Introduction

To the fundamentals of information technology belongs converting numbers.

The famous Horner Scheme can be used to convert numbers between various numerical systems. This java application provides a way to learn and to practice converting numbers with the Horner Scheme.

2. The applications user interface

The Horner application can be started with the html file “Horner.htm”. The screen elements are divided into 2 parts. The left menue part lets you choose the conversion options and the right part shows the Horner conversion table.

You can see 2 tables in the left screen part. Here you can choose between the 2 modi the Horner application provides. On the right you can see an example scheme with description tags.

3. How to convert

The animation mode

In the animation mode you can choose the source base from where you want to start your conversion and a target base where you want to convert to. Then choose whether you want to see how whole part or fraction part numbers are converted. Now just push the Go button and according to your choices the Horner conversion table will be built on the right. Now you have to click in the “Number” TextField and choose a number to convert. After pushing the Start button you can see the first conversion step marked with red background color. In the comment field you can see a description of the current step.

With the shown buttonbar you can navigate through every single conversion step from the first to the last.

animation example

The practice mode

In practice mode you choose the source base from where you want to start your conversion and a target base where you want to convert to. Then choose whether you want to see how whole part or fraction part numbers are converted. Now just push the Go button and according to your choices the Horner conversion table will be built on the right. Now you have to click in the “Number” TextField and choose a number you want to practice. Now take a sheet of paper and process the conversion by yourself. Put your solution into the green marked textfield and press the button “Validate”. In the comment panel you will be shown if your solution is right or wrong.

practicing example

4. The functions

The Horner application offers functions for converting whole part or fraction part numbers:

From	To
Decimal	Hexadecimal
Decimal	Dual
Decimal	Octal
Decimal	Any
Hexadecimal	Decimal
Dual	Decimal
Octal	Decimal
Any	Decimal
Any	Any

5. Requirements:

· Java Runtime environment version 1.4.1. (www.java.sun.com)

· Internet Explorer 4.0 or compatible Internet browser

· JavaScript must be enabled

6. Contact

Holger Förster s4087@htw-dresden.de

Rocco Hausdorf s4129@htw-dresden.de