问题 填空题

本程序的功能是:找出所有满足各位数字之和正好是其所有质因子之和的三位数。例如378,其各位数字之和为18,而其质因子2,3,3,3,7之和也是18,所以378是满足条件的数。

Option Explicit

Private Sub CmdFind_Click()

Dim i As Integer,p As String,st As String,st1 As String

For i=100 To 999

()

If csum(i)=zyz(i,st) Then

p=CStr(i)

st1=Left(p,1) & "+" & Mid(p,2,1) & "+" & Right(p,1)

List1.AddItem i & ": " & st1 & "=" & Left(st,Len(st)-1)

End If

Next i

If List1.ListCount=0 Then

List1.AddItem "无满足要求的数!"

End If

End Sub

Private Function csum(m As Integer)As Integer ’求各位数字之和

Dim i As Integer,p As String

p=CStr(m)

For i=1 To Len(p)

()

Next i

End Function

Private Function zyz(ByVal m As Integer,st As String)As Integer ’求所有质因子之和

Dim i As Integer

i=2

Do

If m Mod i=0 Then

zyz=zyz+i

st=st & i & "+"

m=m\i

EIse

()

End If

Loop Until ()

End Function

答案

参考答案:st="";csum=csum+val(mid(p,i,A));i=i+A;m=A

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单项选择题