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Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim leapyears() As Integer = GetLeapYears(2000, 2100)
Dim str As String
Try
Dim count As Integer = UBound(leapyears) + 1
str = "闰年个数:" + count.ToString
For i = 0 To UBound(leapyears)
str += " " + leapyears(i).ToString
Next
TextBox1.Text = str
Catch ex As Exception
End Try
End Sub
''' summary
''' 获取指定年份区间中所有闰年组成的数组
''' /summary
''' param name="StartYear"起始年份/param
''' param name="EndYear"结束年份/param
''' returns/returns
''' remarks/remarks
Private Function GetLeapYears(StartYear As Integer, EndYear As Integer) As Integer()
Dim leapyears() As Integer = Nothing
Dim index As Integer = 0
For i = StartYear To EndYear
If (i Mod 400 = 0) Or (i Mod 4 = 0 And i Mod 100 0) Then
ReDim Preserve leapyears(index)
leapyears(index) = i
index += 1
End If
Next
Return leapyears
End Function
扩展资料：
注意事项
DateSerial返回包含指定的年、月、日的 Variant (Date)。
语法：DateSerial(year, month, day)
Private Function MonthToLeapYear(ByVal Yea As Integer) As Boolean
MonthToLeapYear = Day(DateSerial(Yea, 2, 29)) = 29
End Function
Private Sub Command1_Click()
If Len(Text1.Text) = 4 Then
If MonthToLeapYear(Text1.Text) = True Then
Print Text1.Text "年是闰年"
Else
Print Text1.Text "年是平年"
End If
Else
Print "错误：请输入正确的年份！"
End If
End Sub
在VB.NET中进行日期处理时，避免手工判断或计算是个好主意，因为手工计算由于代码的质量问题可能不准确。可以使用.NET提供的类的功能进行日期处理。
例如，如果需要判断给定的某年是否闰年，可以使用VB.NET的IsLeapYear函数。下面是如何使用该函数的一个例子：
Private Sub LeapYearCheck()
Dim bLeapYear AsBoolean
bLeapYear = Date.IsLeapYear(Now.Year)
MessageBox.Show(bLeapYear)
bLeapYear = Date.IsLeapYear(2004)
MessageBox.Show(bLeapYear)
End Sub
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
1）x+a Mod 3 * (Int(x+y)Mod 2)/4 =
2.5 + 7 Mod 3 *(int(2.5+4.7) Mod 2)/4
=9.5 mod 3*3/4
= 9.5 mod 2
=4