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To hop cua mot so

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To hop cua mot so

Post  Admin on Thu Feb 10, 2011 8:21 am

Code:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim N, P, TH As Integer
        N = CInt(txtN.Text)
        P = CInt(txtP.Text)
        If N - P < 0 Then
            ErrorProvider1.SetError(txtN, "N phai lon hon P")
            Label4.Visible = True
            Label4.Text = ErrorProvider1.GetError(txtN)
            'MsgBox("N khong be hon P", vbOKOnly + vbCritical, "Warning")
            txtN.Text = ""
            txtP.Text = ""
            Return
        Else
            TH = 1
            For i = 1 To P
                TH = TH * (N - i + 1) / i
            Next
        End If
        MsgBox("To hop " & N & " chap " & P & " la: " & TH, vbOKOnly + vbCritical, "Ket Qua")
        txtN.Text = ""
        txtP.Text = ""
    End Sub

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