public static LargeInt Multiply(LargeInt x, LargeInt y)
{
LargeInt newInt = new LargeInt();
for (int i = 0; i < y.Length; i++)
{
int carry = 0;
for (int j = 0; j < x.Length; j++)
{
int zDigit = (y.GetDigitAt(i) * x.GetDigitAt(j)) + newInt.GetDigitAt(i + j) + carry;
newInt.SetDigitAt(i + j, zDigit % 10);
carry = zDigit / 10;
}
newInt.SetDigitAt(i + x.Length, carry);
}
return newInt;
}
public static LargeInt Add(LargeInt x, LargeInt y)
{
int carry = 0;
int loopLength = Math.Max(x.Length, y.Length) + 1;
LargeInt newInt = new LargeInt();
for (int i = 0; i < loopLength; i++)
{
int xDigit = 0, yDigit = 0, zDigit = 0;
xDigit = x.GetDigitAt(i);
yDigit = y.GetDigitAt(i);
zDigit = xDigit + yDigit + carry;
if (zDigit >= radix)
{
zDigit %= radix;
carry = 1;
}
else
{
carry = 0;
}
newInt.SetDigitAt(i, zDigit);
}
return newInt;
}