leetcode 027 —— 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.

思路： 常规方法

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