/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Implement the Pythagorean Theorem. 
  
using System;  
  
public class Pythagorean {     
  public static void Main() {     
    double s1; 
    double s2; 
    double hypot; 
    string str; 
 
    Console.WriteLine("Enter length of first side: "); 
    str = Console.ReadLine(); 
    s1 = Double.Parse(str); 
 
    Console.WriteLine("Enter length of second side: "); 
    str = Console.ReadLine(); 
    s2 = Double.Parse(str); 
 
    hypot = Math.Sqrt(s1*s1 + s2*s2); 
  
    Console.WriteLine("Hypotenuse is " + hypot); 
  }     
}


           
         
     

   
 
/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
/*  
   This program illustrates the differences 
   between int and double. 
*/  
 
using System; 
 
public class Example3IntDouble {  
  public static void Main() {  
    int ivar;     // this declares an int variable 
    double dvar;  // this declares a floating-point variable 
 
    ivar = 100;   // assign ivar the value 100 
    
    dvar = 100.0; // assign dvar the value 100.0 
 
    Console.WriteLine("Original value of ivar: " + ivar); 
    Console.WriteLine("Original value of dvar: " + dvar); 
 
    Console.WriteLine(); // print a blank line 
 
    // now, divide both by 3 
    ivar = ivar / 3;  
    dvar = dvar / 3.0; 
 
    Console.WriteLine("ivar after division: " + ivar); 
    Console.WriteLine("dvar after division: " + dvar); 
  }  
}


           
         
     

   
 
/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Compute the area of a circle. 
  
using System;  
   
public class ComputeCircle {   
  static void Main() {   
    double radius; 
    double area; 
 
    radius = 10.0; 
    area = radius * radius * 3.1416; 
 
    Console.WriteLine("Area is " + area); 
  }   
}

           
         
     

   
 

using System;

class DecimalToU_Int32Demo
{
    const string formatter = "{0,17}{1,19}{2,19}";
    public static string GetExceptionType( Exception ex )
    {
        string exceptionType = ex.GetType( ).ToString( );
        return exceptionType.Substring(exceptionType.LastIndexOf( '.' ) + 1 );
    }
    public static void DecimalToU_Int32( decimal argument )
    {
        object Int32Value;
        object UInt32Value;

        try
        {
            Int32Value = (int)argument;
        }
        catch( Exception ex )
        {
            Int32Value = GetExceptionType( ex );
        }

        try
        {
            UInt32Value = (uint)argument;
        }
        catch( Exception ex )
        {
            UInt32Value = GetExceptionType( ex );
        }

        Console.WriteLine( formatter, argument, Int32Value, UInt32Value );
    }

    public static void Main( )
    {
        DecimalToU_Int32( 123M );
    }
}

   
     

   
  

using System;

class MainEntryPoint {
    static void Main(string[] args) {
        Money cash1 = new Money();
        cash1.Amount = 40M;
        Console.WriteLine("cash1.ToString() returns: " + cash1.ToString());
        Console.ReadLine();
    }
}
class Money {
    private decimal amount;

    public decimal Amount {
        get {
            return amount;
        }
        set {
            amount = value;
        }
    }
    public override string ToString() {
        return "$" + Amount.ToString();
    }
}

   
     

   
 
/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Manually create a decimal number. 
  
using System;  
  
public class CreateDec {     
  public static void Main() {     
    decimal d = new decimal(12345, 0, 0, false, 2); 
 
    Console.WriteLine(d); 
  }     
}


           
         
     

   
 
/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

/* Compute the initial investment needed to attain 
   a known future value given annual rate of return 
   and the time period in years. */ 
  
using System;  
  
public class IntialInvestment {     
  public static void Main() {     
    decimal InitInvest; // initial investment 
    decimal FutVal;     // future value 
 
    double NumYears;    // number of years  
    double IntRate;     // annual rate of return as a decimal 
  
    string str;  
 
    Console.Write("Enter future value: "); 
    str = Console.ReadLine(); 
    try {  
      FutVal = Decimal.Parse(str);  
    } catch(FormatException exc) {  
      Console.WriteLine(exc.Message);  
      return;  
    }  
 
    Console.Write("Enter interest rate (such as 0.085): "); 
    str = Console.ReadLine(); 
    try {  
      IntRate = Double.Parse(str);  
    } catch(FormatException exc) {  
      Console.WriteLine(exc.Message);  
      return;  
    }  
 
    Console.Write("Enter number of years: "); 
    str = Console.ReadLine(); 
    try {  
      NumYears = Double.Parse(str);  
    } catch(FormatException exc) {  
      Console.WriteLine(exc.Message);  
      return;  
    }  
 
    InitInvest = FutVal / (decimal) Math.Pow(IntRate+1.0, NumYears);  
  
    Console.WriteLine("Initial investment required: {0:C}", 
                      InitInvest);  
  }     
}