Divide-BigInteger.ps1

1. <# 
2. .SYNOPSIS 
3.     This script divides big integers using .NET Framework. 
4. .DESCRIPTION 
5.     This script reimplements an MSDN Sample script using powershell. The 
6.     script creates a dividor and an arry of dividends, then performs  
7.     division operations several ways. 
8. .NOTES 
9.     File Name  : Divide-BigInteger.ps1 
10.     Author     : Thomas Lee - tfl@psp.co.uk 
11.     Requires   : PowerShell Version 2.0 
12.                  .NET Framework 4.0 or higher 
13. .LINK 
14.     This script posted to: 
15.         http://www.pshscripts.blogspot.com 
16.     MSDN Sample posted at: 
17.         http://msdn.microsoft.com/en-us/library/system.numerics.biginteger.divide.aspx 
18. .EXAMPLE 
19.     PSH [C:\foo]: . 'C:\Users\tfl\AppData\Local\Temp\Untitled7.ps1' 
20.     Dividend: 680,564,693,277,057,719,623,408,366,969,033,850,880 
21.     Divisor:  85,070,591,730,234,615,847,396,907,784,232,501,249 
22.     Results: 
23.        Using Divide method:     7 
24.        Using Division operator: 7 
25.        Using DivRem method:     7, remainder 85,070,551,165,415,408,691,630,012,479,406,342,137 
26.  
27.     Dividend: 90,612,345,123,875,509,091,827,560,007,100,099 
28.     Divisor:  85,070,591,730,234,615,847,396,907,784,232,501,249 
29.     Results: 
30.        Using Divide method:     0 
31.        Using Division operator: 0 
32.        Using DivRem method:     0, remainder 90,612,345,123,875,509,091,827,560,007,100,099 
33.      
34.     Dividend: 1 
35.     Divisor:  85,070,591,730,234,615,847,396,907,784,232,501,249 
36.     Results: 
37.        Using Divide method:     0 
38.        Using Division operator: 0 
39.        Using DivRem method:     0, remainder 1 
40.      
41.     Dividend: 19,807,040,619,342,712,359,383,728,129 
42.     Divisor:  85,070,591,730,234,615,847,396,907,784,232,501,249 
43.     Results: 
44.        Using Divide method:     0 
45.        Using Division operator: 0 
46.        Using DivRem method:     0, remainder 19,807,040,619,342,712,359,383,728,129 
47.   
48.     Dividend: 85,070,591,730,234,615,847,396,907,784,232,501,250 
49.     Divisor:  85,070,591,730,234,615,847,396,907,784,232,501,249 
50.     Results:  
51.        Using Divide method:     1 
52.        Using Division operator: 1 
53.        Using DivRem method:     1, remainder 1 
54.   
55. #> 
56.  
57. # Add namespace 
58. $r = [system.Reflection.Assembly]::LoadWithPartialName("System.Numerics") 
59.  
60. #Create a big integer divisor and an array of dividends 
61. $divisor = [system.numerics.BigInteger]::pow([Int64]::MaxValue, 2) 
62. $dividends = @() 
63. $dividends += [system.numerics.BigInteger]::Multiply(([system.numerics.BigInteger] [system.Single]::MaxValue), 2) 
64. $dividends += [system.numerics.BigInteger]::Parse("90612345123875509091827560007100099")  
65. $dividends += [system.numerics.BigInteger]::One 
66. $dividends += [system.numerics.BigInteger]::Multiply([Int32]::MaxValue, [Int64]::MaxValue) 
67. $dividends += $divisor + [system.numerics.BigInteger]::One  
68.   
69. #Divide each dividend by divisor in three different ways 
70. foreach ($dividend in $dividends) { 
71.     "Dividend: {0:N0}" -f $dividend 
72.     "Divisor:  {0:N0}" -f $divisor 
73.     "Results:" 
74.     "   Using Divide method:     {0:N0}" -f  [system.Numerics.BigInteger]::Divide($dividend, $divisor) 
75.     "   Using Division operator: {0:N0}" -f ($dividend/$divisor) 
76.     $remainder = [system.Numerics.BigInteger]::Zero 
77.     $quotient = [system.numerics.BigInteger]::DivRem($dividend, $divisor, [ref] $remainder) 
78.     "   Using DivRem method:     {0:N0}, remainder {1:N0}" -f $quotient, $remainder 
79.     "" 
80. }         

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