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包含vb.net求n的词条

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VB.NET2010 给定求组合数公式为Cmn=m!/n!(m-n)! ， 编一程序 ， 输入m和n的值 ， 求Cmn的值 。要用Sub过程Module Module1
Private Sub fac(ByVal x As ULong, ByRef y As ULong)
Dim i, a
a = 1
For i = 1 To x
a = a * i
Next i
y = a
End Sub
Sub Main()
Dim m, n, Cmn, c1, c2, c3
Console.WriteLine("m=")
m = Val(Console.ReadLine())
【包含vb.net求n的词条】Console.WriteLine("n=")
n = Val(Console.ReadLine())
Call fac(m, c1) : Call fac(n, c2) : Call fac(m - n, c3)
Cmn = c1 / (c2 * c3)
Console.Write("Cmn={0}", Cmn)
End Sub
End Module
用VB.NET编写一个程序 ：编一求阶乘的函数f(n),主调程序求组合数的程序，分别调用f(n),用来计算组合数的值Private Sub Command1_Click()
Dim A, B, C
A = 10
B = 3
C = f(A) / (f(B) * f(A - B))
Print C
End Sub
Private Function f(n)
Dim I As Integer
f = 1
For I = 1 To n
f = f * I
Next I
End Function
如何用vb.net求n阶勒让达多项式Function P(ByVal N As Integer, ByVal x As Single) As Single
If N = 0 Then
Return 1
ElseIf N = 1 Then
Return x
Else
Return ((2 * N - 1) * x * P(N - 1, x) - (N - 1) * P(N - 2, x)) / N
End If
End Function
vb.net程序 。求组合数 ， 其中m,n用inputbox函数输入 。要求用用户自定义过程计算阶乘，组Public Class Form1
Private Function jc1(ByVal q)
Dim i%, p%
p = 1
For i = 1 To q Step 1
p = p * i
Next
Return p
End Function
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim m!, n!, info1$, info2, C!, title$
title = "组合数计算小能手"
info1 = "请输入m的值"
info2 = "请输入n的值"
m = Val(InputBox(info1, title))
n = Val(InputBox(info2, title))
C = jc1(m) / jc1(n) / jc1(m - n)
Label1.Text = "结果是"" "C
End Sub
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