no viable conversion from returned value of type 'int [nums.size()]' to function return ty-CodePudding

I'm trying to solve this simple leetcode question. I'm pretty sure the approach is correct but for some reason, I get the following error and I'm not able to figure it out.

Error:

Line 9: Char 16: error: no viable conversion from returned value of type 'int [nums.size()]' to function return type 'vector' return ans;

Here's my code:

class Solution {
public:
    vector<int> shuffle(vector<int>& nums, int n) {
        int ans[nums.size()];
        for (int i=0,j=n;i<n;i  ,j  ) {
            ans[i*2] = nums[i];
            ans[1 i*2] = nums[j];
        }
        return ans;
    }
};

Problem link: https://leetcode.com/problems/shuffle-the-array/

A little explanation would be appreciated! Thanks

CodePudding user response：

ans is an array, not a std::vector. There is no implicit conversion of an array to a std::vector. To fix your code, just declare ans as:

std::vector<int> ans(nums.size());