我好象写对了吧```
Private Sub Command1_Click()
Dim a As Double
Dim b As Double
Dim c As Double
Dim m_input As String
a = Val(InputBox("请输入第一个数", "a"))
b = Val(InputBox("请输入第二个数", "b"))
c = Val(InputBox("请输入第三个数", "c"))
If a > b Then
If a > c Then
If b > c Then
m_input = Str(a) + Str(b) + Str(c)
Else
m_input = Str(a) + Str(c) + Str(b)
End If
Else
m_input = Str(c) + Str(a) + Str(b)
End If
Else
If b > c Then
If c > a Then
m_input = Str(b) + Str(c) + Str(a)
Else
m_input = Str(b) + Str(a) + Str(c)
End If
Else
m_input = Str(c) + Str(b) + Str(a)
End If
End If
Text1.Text = m_input
End Sub