class Solution {
public int[] plusOne(int[] digits) {
for (int i = digits.length - 1; i >= 0; i--) {
if (digits[i] != 9) {
digits[i]++;
return digits;
}
digits[i] = 0;
}
//跳出for循环,说明数字全部是9
int[] temp = new int[digits.length + 1];
temp[0] = 1;
return temp;
}
}