C++删除排序数组中的重复项

 1 class Solution {
 2 public:
 3     int removeDuplicates(vector<int>& nums) {
 4         if (nums.empty()) {
 5             return 0;
 6         } 
 7         int j = 0;
 8         for (int i = 0; i < nums.size(); i++ ){
 9             if (nums[j]!=nums[i]){
10                 j++;
11                 nums[j] = nums[i];
12             }
13         }
14     return j+1;    
15     }
16 };