填空题 [说明]
本程序求3～100之间的所有素数(质数)并统计个数；同时将这些素数从小到大依次写入顺序文件E: \dataout.txt；素数的个数显示在窗体Form1上。
[Visual Basic 代码]
Private Sub Command1_ Click ( )
Dim count as integer, flag as Boolean
Dim t1 as Integer, t2 as Integer
__ 1__
Count=0
For t1=3 to 100
Flag=Tree
For t2=2 to Int( Sqr ( t1 ) )
If __ 2__ Then flag=False
Next t2
__ 3__
count= __ 4__
write #1, t1
End if
Next t1
__ 5__
Close #1
End Sub