数字处理的一个小问题
String[] Scale = { "分", "角", "元", "拾", "佰", "仟", "万", "拾", "佰", "仟", "亿", "拾", "佰", "仟", "兆", "拾", "佰", "仟" };
            String[] Base = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
            String Temp = textBox1.Text.ToString();
            String Info = null;
            int index = Temp.IndexOf(".", 0, Temp.Length);//判断是否有小数点
            if (index != -1)
            {
                Temp = Temp.Remove(Temp.IndexOf("."), 1);
                for (int i = Temp.Length; i > 0; i--)
                {
                    int Data = Convert.ToInt16(Temp[Temp.Length - i]);
                    Info += Base[Data - 48];
                    Info += Scale[i - 1];
                }
            }
            else
            {
                for (int i = Temp.Length; i > 0; i--)
                {

                    int Data = Convert.ToInt16(Temp[Temp.Length - i]);
                    Info += Base[Data - 48];
                    Info += Scale[i + 1];
                }

            }

            textBox2.Text = Info;
这是一个将奖金额小写转换成大写的代码
当中 Info += Base[Data - 48];是什么意思
我有理解不了
怎么是—48呢
不就成负数了吗
？

转换成Int16是其ASCII值（扩展到16位）48是0的ASCII码值。这样 就得到绝对的数值

谢谢
难以言表