internal static BigNumber Division(BigNumber one, BigNumber two, int precision)
{
List <int> oneInt = new List <int>();
List <int> oneDecimal = new List <int>();
oneInt.AddRange(one.IntPart);
oneDecimal.AddRange(one.DecimalPart);
List <int> twoText = new List <int>();
twoText.AddRange(two.IntPart);
twoText.AddRange(two.DecimalPart);
RemoveStartZero(twoText);
//将15/2.3 移位为 150/23 //DecimalLength
for (int i = 0; i < two.DecimalPart.Count; i++)
{
if (oneDecimal.Count != 0)
{
oneInt.Add(oneDecimal[0]);
oneDecimal.RemoveAt(0);
}
else
{
oneInt.Add(0);
}
}
List <int> resultInt = new List <int>();
List <int> resultDecimal = new List <int>();
int index = twoText.Count < oneInt.Count ? twoText.Count - 1 : oneInt.Count - 1;
List <int> div = oneInt.GetRange(0, index + 1);
//正数部分的除法
while (true)
{
resultInt.Add(Division(div, twoText));
div = IntMinus(div, Multiply(twoText, new List <int> {
resultInt[resultInt.Count - 1]
}), 0);
index++;
if (index >= oneInt.Count)
{
break;
}
div.Add(oneInt[index]);
}
index = 0;
//小数部分的除法
while (true)
{
//满足精度后退出
if (resultDecimal.Count >= precision)
{
break;
}
if (index >= oneDecimal.Count)
{
div.Add(0);
}
else
{
div.Add(oneDecimal[index]);
}
int r = Division(div, twoText);
resultDecimal.Add(r);
div = IntMinus(div, Multiply(twoText, new List <int> {
r
}), 0);
index++;
}
return(new BigNumber(resultInt, resultDecimal, !(one.IsPlus ^ two.IsPlus)));
}
/// <summary>除</summary>
public static BigNumber Division(BigNumber one, BigNumber two)
{
return(Division(one, two, 50));
}
static int ComparePlus(BigNumber one, BigNumber two)
{
BigCalculate.RemoveStartZero(one.IntPart);
BigCalculate.RemoveStartZero(two.IntPart);
int minDecimalLength = one.DecimalPart.Count < two.DecimalPart.Count ? one.DecimalPart.Count : two.DecimalPart.Count;
//通过正数的长短比较
if (one.IntPart.Count > two.IntPart.Count)
{
return(1);
}
else if (one.IntPart.Count < two.IntPart.Count)
{
return(-1);
}
else
{
//从最高位依次比较
for (int i = 0; i < one.IntPart.Count; i++)
{
if (one.IntPart[i] > two.IntPart[i])
{
return(1);
}
else if (one.IntPart[i] < two.IntPart[i])
{
return(-1);
}
}
//比较小数部分，行判断是否有小数位
if (one.DecimalPart.Count == 0 && two.DecimalPart.Count != 0)
{
return(-1);
}
else if (one.DecimalPart.Count != 0 && two.DecimalPart.Count == 0)
{
return(1);
}
else if (one.DecimalPart.Count == 0 && two.DecimalPart.Count == 0)
{
return(0);
}
else
{
for (int i = 0; i < minDecimalLength; i++)
{
if (one.DecimalPart[i] > two.DecimalPart[i])
{
return(1);
}
else if (one.DecimalPart[i] < two.DecimalPart[i])
{
return(-1);
}
}
if (one.DecimalPart.Count > two.DecimalPart.Count)
{
return(1);
}
else if (one.DecimalPart.Count < two.DecimalPart.Count)
{
return(-1);
}
}
return(0);
}
}