vb随机产生10个两位数随机正整数,求其中素数之和(用过程实现判断一个数是否是素数)
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vb随机产生10个两位数随机正整数,求其中素数之和(用过程实现判断一个数是否是素数)
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a = 1 To 10
r = Int(90 * Rnd + 10)
Print r;
If f = True Then s = s + r
Next a
Print
Print "其中素数的总和="; s
End Sub
Public Function su(i As Integer, n As Integer) As Boolean
Dim f As Boolean
For i = 2 To n - 1
If n Mod i = 0 Then
f = False
Exit For
End If
Next i
If i < n - 1 Then
f = True
Print r;
End If
End Function
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a = 1 To 10
r = Int(90 * Rnd + 10)
Print r;
If f = True Then s = s + r
Next a
Print "其中素数的总和="; s
End Sub
Public Function su(i As Integer, n As Integer) As Boolean
Dim f As Boolean
For i = 2 To n - 1
If n Mod i = 0 Then
f = False
Exit For
End If
Next i
If i < n - 1 Then
f = True
Print r;
End If
End Function
Public Function IsPrime(ByVal x As Integer) As Boolean
Dim i As Integer
IsPrime = True
For i=2 To x-1
If (x Mod i) = 0 Then
IsPrime = False
Exit Function
End If
Next
End Function
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a=1 To 10
r = Int(90 * Rnd + 10)
If IsPrime(r) Then s = s + r
Next
Print r
End Sub
再问: 为什么和一直是0啊?
再答: 那是随机数没有产生素数的缘故
把r = Int(90 * Rnd + 10) 改成
r = Int(90 * Rnd) + 10 试试
再问: 不行。。有素数的,但是和就是0,代码在题目补充那里
再答: Public Function IsPrime(ByVal x As Integer) As Boolean
Dim i As Integer
IsPrime = True
For i=2 To x-1
If (x Mod i) = 0 Then
IsPrime = False
Exit Function
End If
Next
End Function
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a=1 To 10
r = Int(90 * Rnd) + 10 '<--修改这里,原来 r = Int(90 * Rnd + 10)
If IsPrime(r) Then s = s + r
Next
Print s '<--修改这里,原来误写为r
End Sub
Dim i As Integer
IsPrime = True
For i=2 To x-1
If (x Mod i) = 0 Then
IsPrime = False
Exit Function
End If
Next
End Function
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a=1 To 10
r = Int(90 * Rnd + 10)
If IsPrime(r) Then s = s + r
Next
Print r
End Sub
再问: 为什么和一直是0啊?
再答: 那是随机数没有产生素数的缘故
把r = Int(90 * Rnd + 10) 改成
r = Int(90 * Rnd) + 10 试试
再问: 不行。。有素数的,但是和就是0,代码在题目补充那里
再答: Public Function IsPrime(ByVal x As Integer) As Boolean
Dim i As Integer
IsPrime = True
For i=2 To x-1
If (x Mod i) = 0 Then
IsPrime = False
Exit Function
End If
Next
End Function
Private Sub Command1_Click()
Dim a As Integer, r As Integer, s As Integer
s = 0
For a=1 To 10
r = Int(90 * Rnd) + 10 '<--修改这里,原来 r = Int(90 * Rnd + 10)
If IsPrime(r) Then s = s + r
Next
Print s '<--修改这里,原来误写为r
End Sub
vb随机产生10个两位数随机正整数,求其中素数之和(用过程实现判断一个数是否是素数)
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