26. Remove Duplicates from Sorted Array C++ 删除排序数组中的重复项

https://leetcode.com/problems/remove-duplicates-from-sorted-array/

双指针，注意初始时左右指针指向首元素！

class Solution {
public:
    int removeDuplicates(vector<int>& nums) {
        int n=1;
        int i = nums.size();
        if(i == 0)
            return 0;
        int *l = &nums[0],*r = &nums[0];
        while(*r != nums[i-1])
        {
            while(*l == *r)
            {
                r++;
            }
            l++;
            *l = *r;
            n++;
        }
        return n;
    }
};