public static NewDouble Input(string text)
{
// Type of the number ==> one or more natural digits -> '.' or ',' -> from one to 40 digits -> 'E' or 'e' -> one or more digit
Match match = Regex.Match(text, @"^(\d+(?:[\.|,]?\d{1,39})?)(?:[E|e]([+|-]?\d+)?)?$", RegexOptions.Compiled);
List <int> nums;
int exp;
if (match.Success)
{
// take an numbers before 'E' or 'e' and conver to int list, where separator is '.' or ','
nums = match.Groups[1].Value.Select(s => (int)char.GetNumericValue(s)).ToList();
//If text doesnt contain separator (4e22, or 12e-1)add an separator and zero ( 4e12 ->4,0e12)
if (!nums.Contains(-1))
{
nums.AddRange(new[] { -1, 0 });
}
if (!text.Contains('e') && !text.Contains('E'))
{
exp = 0;
}
// Take an numbers after 'E' or 'e'
else
{
exp = int.Parse(match.Groups[2].Value);
}
}
else
{
throw new FormatException("Invalid format");
}
NewDouble result = new NewDouble(exp, nums);
result.SetNormalForm();
result.Trim();
return(result);
}
public static NewDouble operator +(NewDouble elem1, NewDouble elem2)
{
int resultExponent = (elem1._exponent + elem2._exponent) / 2;
// Set the same exponential in both numbers
if (elem1._exponent != elem2._exponent)
{
elem1.SetExponent(resultExponent);
elem2.SetExponent(resultExponent);
}
//Synchronization of elements in nums
int index1 = elem1._nums.IndexOf(-1);
int index2 = elem2._nums.IndexOf(-1);
while (index1 != index2)
{
if (index1 > index2)
{
elem2._nums.Insert(0, 0);
index2++;
}
else
{
elem1._nums.Insert(0, 0);
index1++;
}
}
while (elem1._nums.Count != elem2._nums.Count)
{
if (elem1._nums.Count > elem2._nums.Count)
{
elem2._nums.Insert(elem2._nums.Count, 0);
}
else
{
elem1._nums.Insert(elem1._nums.Count, 0);
}
}
// Addition
int[] resultNums = new int[elem1._nums.Count + 1];
for (int i = elem1._nums.Count - 1; i >= 0; i--)
{
if (elem1._nums[i] == -1)
{
if (resultNums[i + 1] != 0)
{
resultNums[i]++;
}
resultNums[i + 1] = -1;
continue;
}
resultNums[i + 1] += elem1._nums[i] + elem2._nums[i];
if (resultNums[i + 1] >= 10)
{
resultNums[i + 1] -= 10;
resultNums[i]++;
}
}
NewDouble result = new NewDouble(resultExponent, resultNums);
result.SetNormalForm();
return(result);
}