How to return an array in a function in cpp

This is my code

*int my_arr(int a){
 int arr[a];
 for(int i=0;i<a;i++){
   cin>>arr[i];
  }
   return arr;
}

I keep getting errors

>Solution :

You can’t return an array in cpp. Instead use vectors.

vector<int> my_arr(int a){
vector<int> arr;
for(int i=0;i<a;i++){
 int input;
 cin>>input;
 arr.push_back(input)  // to push elements into vector
}
return arr;
}