# Convert Decimal Number to Octal Number in Windows Store App

Introduction

My previous article explained how to convert a number expressed as an octal number into a number expressed as a decimal number. This article shows how to do the reverse (decimal to octal). So let us first understand the conversion.

Octal Number: A number expressed using the base 8 number system with digits 0 to 7.

Decimal Number: A number expressed using the base 10 number system with digits 0 to 9.

Conversion Example: suppose you want to convert the number 500 expressed as a decimal to a number expressed as an octal number. Then use the following procedure.

Step 1: 500/8 Then the remainder=4, Quotient=62
Step 2: 62/8 Then the remainder=6, Quotient=7
Step 3: 7/8  Then  the remainder=7, Quotient=0

Hence the equivalent octal number = 764.

Use the following procedure to create it.

Step 1

First of all you must create a new Windows Store Application.
Open Visual Studio 2012
"File" -> "New" -> "Project..."
Choose "Template" -> "Visual C#" -> "Window Store app"
Choose "Blank App (XAML)" then rename the application

Step 2

Write the following XAML code in "Mainpage.Xaml" (that is available in Solution Explorer):

<Page

x:Class="deimal_to_octal_conversion_app.MainPage"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:local="using:deimal_to_octal_conversion_app"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

mc:Ignorable="d">

<Grid Background="red">

<Grid.ColumnDefinitions>

<ColumnDefinition Width="313*"/>

<ColumnDefinition Width="254*"/>

<ColumnDefinition Width="788*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="78*"/>

<RowDefinition Height="49*"/>

<RowDefinition Height="37*"/>

<RowDefinition Height="40*"/>

<RowDefinition Height="39*"/>

<RowDefinition Height="525*"/>

</Grid.RowDefinitions>

<TextBlock Text="Decimal to Octal Converter app" Grid.ColumnSpan="3" Grid.Row="1" Foreground="White" FontSize="20" FontFamily="Arial" TextAlignment="Center"></TextBlock>

<TextBlock Text="Enter Decimal Number :" FontFamily="Arial" FontSize="15" Foreground="White" Grid.Column="1" Grid.Row="2" Grid.RowSpan="4"></TextBlock>

<TextBox x:Name="textbox1" Grid.Column="2" Grid.Row="2" Width="200" HorizontalAlignment="Left" Height="20" VerticalAlignment="Top" />

<TextBlock Text="Eqivalent Octal Number " FontSize="15" Foreground="White" Grid.Column="1" Grid.Row="3"></TextBlock>

<TextBlock x:Name="text1" FontSize="15" Foreground="White" Grid.Column="2" Grid.Row="3" Width="200" HorizontalAlignment="Left" ></TextBlock>

<Button x:Name="button1" Grid.Column="2" Grid.Row="4" Background="Yellow" Foreground="Black" Width="150" Content="Click" Click="button1_Click"></Button>

</Grid>

</Page>

Step 3

Now write the following C# code for the button within "Mainpage.Xaml.cs".

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

using Windows.Foundation;

using Windows.Foundation.Collections;

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Controls.Primitives;

using Windows.UI.Xaml.Data;

using Windows.UI.Xaml.Input;

using Windows.UI.Xaml.Media;

namespace deimal_to_octal_conversion_app

{

public sealed partial class MainPage : Page

{

public MainPage()

{

this.InitializeComponent();

}

{

}

private void button1_Click(object sender, RoutedEventArgs e)

{

int decnum = 0,i=0;

int[] octnum = new int;

decnum = int.Parse(textbox1.Text);

while (decnum != 0)

{

octnum[i++] = decnum % 8;

decnum = decnum / 8;

}

for (int j = i-1; j >= 0; j--)

{

text1.Text += octnum[j].ToString();

}

}

}

}

Step 4