close
decimal i_1 =Convert.ToDecimal(txt1.Text.Trim());
decimal i_2 = Convert .ToDecimal(txt2.Text.Trim());
//真正結果
lab_1.Text = (i_1 / i_2).ToString();
//四捨五入
lab_2.Text = Math.Round((i_1 / i_2), 0, MidpointRounding.AwayFromZero).ToString();
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