public static BigInt Sub(BigInt a, BigInt b)
{
return(null);
}
public static BigInt Sum(BigInt a, BigInt b)
{
int[] result;
BigInt c;
int al = a.Length, bl = b.Length;
if (al == bl)
{
result = new int[al + 1];
for (int i = 0; i < al; i++)
{
if (result[i] + a.Digits[i] + b.Digits[i] > 9)
{
result[i] = (result[i] + a.Digits[i] + b.Digits[i]) % 10;
result[i + 1] += 1;
}
else
{
result[i] += a.Digits[i] + b.Digits[i];
}
}
c = new BigInt(result);
return(c);
}
else
{
int max, min;
if (al > bl)
{
max = al;
min = bl;
}
else
{
max = bl;
min = bl;
}
result = new int[max];
for (int i = 0; i < min; i++)
{
if (result[i] + a.Digits[i] + b.Digits[i] > 9)
{
result[i] = (result[i] + a.Digits[i] + b.Digits[i]) % 10;
result[i + 1] += 1;
}
}
if (al > bl)
{
for (int i = min; i < max; i++)
{
result[i] += a.Digits[i];
}
}
else
{
for (int i = min; i < max; i++)
{
result[i] += b.Digits[i];
}
}
c = new BigInt(result);
}
return(c);
}