Kod programa :
/*
* Created by SharpDevelop.
* User: Peric Zeljko
* Date: 7.10.2011
* Time: 8:51
*
*
* Simple console program for conversion of
* Binary numbers to Decimal
*
*/
using System;
namespace Binary_to_Decimal
{
class Program
{
public static void Main(string[] args)
{
//
// declaration of variables
//
string Binary = "";
bool DecimalRelevance = false;
bool BinaryRelevance = false;
int Index = 0;
int Lenght = 0;
int Exponent = 0;
int Cipher = 0;
double BaseExponent = 0;
double DecimalNumber = 0;
string Letter = "";
//
// not very desirable but necessary
// begining of program label
//
begining :
//
// Hello message to user
//
Console.Title = "Program Binary to Decimal ";
Console.SetWindowSize(80,40);
Console.ForegroundColor = ConsoleColor.Green;
Console.Clear();
Console.WriteLine("****************************************************************************");
Console.WriteLine(" Binary to Decimal");
Console.WriteLine("****************************************************************************");
//
// Get number from Console
//
Console.WriteLine();
Console.Write("Enter binary number (exmpl: 1001) : ");
Binary = "";
Binary = Console.ReadLine();
Console.WriteLine();
Console.WriteLine("****************************************************************************");
//
// Check if it is Decimal number
//
DecimalRelevance = false;
DecimalNumber = 0;
DecimalRelevance = double.TryParse(Binary,out DecimalNumber);
if (DecimalRelevance == true)
{
//
// Clears number from 0
// with all possibilites
//
// exmpl. 0001101 = 1101
//
Binary = Binary.TrimStart('0');
if (Binary =="")
{
Binary = "0";
}
}
else if (DecimalRelevance == false)
{
Console.WriteLine();
Console.WriteLine("Error , you didn't entered a number at all..");
Console.WriteLine();
//
// goto jump is not very desirable but necessary
//
goto end;
}
//
// Check Binary number relevance
//
Index = 0;
Lenght = 0;
Letter = "";
Lenght = Binary.Length;
for (Index=0;Index<Lenght ;Index = Index + 1)
{
Letter = Binary.Substring(Index,1);
if (Letter != "0" && Letter != "1")
{
BinaryRelevance = false;
Index = Lenght;
}
else
{
BinaryRelevance = true;
}
}
if (BinaryRelevance != true)
{
Console.WriteLine();
Console.WriteLine("Error , you didn't enter binary number ...");
Console.WriteLine();
//
// goto jump is not very desirable but necessary
//
goto end;
}
//
// Resolving conversion from Binary to Decimal
// If it is Decimal number
// exmpl. 1001
//
Exponent = 0;
Cipher = 0;
DecimalNumber = 0;
Index = 0;
Lenght = 0;
Letter = "";
Lenght = Binary.Length;
for(Index=0;Index<Lenght ;Index=Index+1)
{
Exponent = Lenght - Index - 1;
Letter = Binary.Substring(Index,1);
BaseExponent = double.Parse(Math.Pow(2,Exponent).ToString());
Cipher = int.Parse(Letter.ToString());
DecimalNumber = DecimalNumber + (Cipher * BaseExponent);
}
//
// Write result
//
Console.WriteLine();
Console.WriteLine("Binary number : " + Binary);
Console.WriteLine();
Console.WriteLine("Decimal number : " + DecimalNumber.ToString());
Console.WriteLine();
//
// not very desirable but necessary
// end of program label
//
end:
Console.WriteLine("****************************************************************************");
Console.WriteLine();
Console.Write("Do you want to run program again y / n : ");
Letter = Console.ReadLine();
if ( Letter == "Y" || Letter == "y")
{
goto begining;
}
}
}
}
}
Po startovanju programa , program zahteva da unesete binarni broj recimo 1001 , a po unosu dobijate rešenje broj 9.
Verovali ili ne ovaj problem se u okviru C - a rešava i samo jednom komandom :
Convert.ToInt32( binarni_broj,2 )
Međutim u programu je primenjeno rešenje koje upravo pokazuje postupak korak po korak kojim se inače dolazi do pretvaranja broja koji pripada binarnom brojnom sistemu u decimalni brojni sistem.Radi se o postupku u matematici :
1001 (binarno) = 1*2^3 + 0*2^2 + 0*2^1 + 1*2^0 = 9 (decimalno)
