Remove Element

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.
分析：给你一个数组和一个具体的值，删除掉数组中的这个值，并且返回新的长度。

class Solution {public:    int removeElement(vector<int>& nums, int val) {        int index;        index=0;        for(int i=0;i<nums.size();i++)        {            if(nums[i]!=val)            nums[index++]=nums[i];        }        return index;    }};