力扣移除元素

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

    }
};