VB.NET写阶乘代码 vb10的阶乘的代码
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()
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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
怎么写vb的阶乘代码
1、For语句实现
Private Sub Command1_Click()
Dim s As Long, n As Integer, i As Integer
n = Val(Text1.Text)
s = 1
For i = 1 To n
s = s * i
Next i
Label4.Caption = Str(s)
End Sub
2、Do While语句实现
Private Sub Command1_Click()
Dim s As Long, n As Integer, i As Integer
n = Val(Text1.Text)
s = 1
i = 1
Do While i = n
s = s * i
i = i + 1
Loop
Label4.Caption = Str(s)
End Sub
扩展资料:
1~10的阶乘的结果如下:
1!=1
2!=2*1=2
3!=3*2*1=6
4!=4*3*2*1=24
5!=5*4*3*2*1=120
6!=6*5*4*3*2*1=720
7!=7*6*5*4*3*2*1=5040
8!=8*7*6*5*4*3*2*1=40320
9!=9*8*7*6*5*4*3*2*1=362880
10!=10*9*8*7*6*5*4*3*2*1=3628800
VB.NET 怎样编写使用Do While 循环输出1-10的阶乘,我是新手请加上文字说明,呵呵,谢谢各位了!
首先在窗体上画两个控件:TextBox1和Button1
TextBox1用来输入需要计算那个数的阶乘
双击Button1进入输入代码,代码如下
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Try
Dim Factorial As Integer = 1 '定义一个变量用来记录阶乘的结果
Dim count As Integer '定义一个变量用来记录需要计算那个数的阶乘
Dim i As Integer = 1 '定义一个数用来循环
count = Int(Val(Me.TextBox1.Text)) '把TextBox1的值赋值给count
Do While i = count '下面开始计算阶乘
Factorial = Factorial * i '计算阶乘
i += 1 '自增1
Loop
MessageBox.Show(Int(Val(Me.TextBox1.Text)) "的阶乘是:" Factorial, "完成", MessageBoxButtons.OK) '弹出计算结果
Catch ex As Exception '出错提示
MessageBox.Show(Err.Description, "出错了", MessageBoxButtons.OK, MessageBoxIcon.Error)
End Try
End Sub
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