[LeetCode] Plus One

Given a non-negative number represented as an array of digits, plus one to the number.

The digits are stored such that the most significant digit is at the head of the list.

直接show code！

class Solution {public:vector<int> plusOne(vector<int> &digits) {int i;for (i = digits.size() - 1; i >= 0; --i){if (digits[i] != 9){++digits[i];return digits;}else {digits[i] = 0;}}//各位全是9if (i < 0) {digits.insert(digits.begin(), 1);}return digits;}};