VB.NET作业

商场折扣问题
Sub Main()
Dim a As Integer = Console.ReadLine
Dim b As Integer
If a < 1000 Then
b = a
ElseIf a >= 1000 And a < 2000 Then
b = a * 0.95
ElseIf a >= 2000 And a < 3000 Then
b = a * 0.9
ElseIf a >= 3000 And a < 5000 Then
b = a * 0.85
ElseIf a >= 5000 Then
b = a * 0.8
Console.WriteLine(b)
End If
End Sub
数字游戏
Sub Main()
Dim a As Integer = Console.ReadLine
If a = 7 Then
Console.WriteLine("正确,继续猜！")
Else : End
End If
Dim b As Integer = Console.ReadLine
If b = 12 Then
Console.WriteLine("对了，再猜！")
Else : End
End If
Dim c As Integer = Console.ReadLine
If c = 13 Then
Console.WriteLine("正确！")
Else : End
End If