public static void TestBigInteger()
{
BigInteger first = new BigInteger("100000000000000000000000000000003453453453");
BigInteger secod = new BigInteger("100000000000000000000000000000003453453453");
BigInteger jami = BigInteger.Add(first, secod);
Console.WriteLine(jami.StringValue);
}
public static BigInteger Add(BigInteger first, BigInteger second)
{
// first = 2000;
// second = 0010;
if (first.Sign != -1 && second.Sign != -1)
{
string s = "";
int reminder = 0;
for (int i = first.StringValue.Length - 1; i >= 0; i--)
{
int a = int.Parse("" + first.StringValue[i]);
int b = int.Parse("" + second.StringValue[i]);
int res = (a + b + reminder)%10;
reminder = (a + b + reminder) / 10;
s = s.Insert(0, res.ToString());
}
if( reminder > 0)
s = s.Insert(0, reminder.ToString());
return new BigInteger(s);
}
return null;
}
public static BigInteger Subtract(BigInteger first, BigInteger second)
{
return null;
}