Sword finger offer 21 Adjust the array order so that odd numbers precede even numbers

Original link ： The finger of the sword Offer 21. Adjust the array order so that the odd Numbers precede the even Numbers

 solution:

class Solution {
public:
    vector<int> exchange(vector<int>& nums) {
        int n = nums.size();
        for(int i = 0,j = 0;i < n;i++) {
            if(nums[i] % 2 != 0) swap(nums[i],nums[j++]);
        }
        return nums;
    }
};