Pow without math.h

int pow(int base, int exp)
    {
      if(exp < 0)
        return -1;

        int result = 1;
        while (exp)
        {
            if (exp & 1)
                result *= base;
            exp >>= 1;
            base *= base;
        }

        return result;
    }

Source: stackoverflow.com

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