Solution in C++

[newonelei]

        int Reverse(int x) {
		if (x == INT_MIN || x == 0)
			return 0;

		int sign = x < 0 ? -1 : 1;
		int val = abs(x);

		int ret_int = 0;
		while (val > 0) {
			if (INT_MAX / 10 < ret_int)
				return 0;
			ret_int = ret_int * 10 + val % 10;
			val /= 10;
		}

		return ret_int * sign;
      }