leetcode 27 -- Remove Element

Remove Element

题目：
Given an array and a value, remove all instances of that value in place and return the new length.
The order of elements can be changed. It doesn’t matter what you leave beyond the new length.

题意：
找到数组中的value并且删除，返回数组的新长度。

思路：
c++注意删除后迭代器失效即可。

代码：

class Solution {
public:
    int removeElement(vector<int>& nums, int val) {
        for(auto iter = nums.begin(); iter != nums.end();){
            if(*iter == val){
                iter = nums.erase(iter);
            }else{
                ++iter;
            }
        }
        return nums.size();
    }
};