Introduction
My previous article explained how to convert Decimal to Octal number and in this article I explain how to convert a number expressed as an octal number to a number expressed as a decimal number. So let us first of all 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 an octal number 764 to decimal number. Then use the following procedure.
Step 1 : 4 * 8^0 =4 * 1=4
Step 2 : 6 * 8^1= 6* 8=48
Step 3 : 7* 8^2=7*64= 448
Hence equivalent decimal number = 4 + 48 + 448 = 500
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
![new-windows-store-app.jpg]()
Step 2
Write the following XAML code in "Mainpage.Xaml" (that is available in Solution Explorer):
<Page
x:Class="Octal_to_Decimal_converter_app.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Octal_to_Decimal_converter_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="Octal to Decimal Converter app" Grid.ColumnSpan="3" Grid.Row="1" Foreground="White" FontSize="20" FontFamily="Arial" TextAlignment="Center"></TextBlock>
<TextBlock Text="Enter Octal 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 Decimal Number is " 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;
using Windows.UI.Xaml.Navigation;
namespace Octal_to_Decimal_converter_app
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
}
private void button1_Click(object sender, RoutedEventArgs e)
{
int octnum = 0, r = 0;
int i=0;
double decnum = 0;
octnum = int.Parse(textbox1.Text);
while (octnum != 0)
{
r = octnum % 10;
decnum = decnum +(r * Math.Pow(8, i++));
octnum = octnum / 10;
}
text1.Text = decnum.ToString();
}
}
}
Step 4
Now Run Your app.
![output-of-converter-app.jpg]()