帮我看看VB设计！急，急

Private Sub ftos_Click()
Dim f As Single, s As Single
s = Val(dushu.Text)
f =9/5 s + 32
sheshi.Caption = Str(f)

End Sub

Private Sub stof_Click()
Dim c As Single, s As Single
s = Val(dushu.Text)
c=5/9(f-32)
huashi.Caption = Str(c)

End Sub

f =9/5 s + 32 电脑总说“缺少语句结束”

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