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.

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题意：
找到数组中的value并且删除，返回数组的新长度。

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思路：
c++注意删除后迭代器失效即可。

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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();    }};