#include <vector>
#include <iostream>

struct A {
    int n;
    A(int n_) : n(n_) {}
};

int main() {
    int arr[] = {1,2,3,4,5,6,7,8,9,10};
    std::vector<int> int_vec(arr, arr+10);
    std::vector<A> A_vec(int_vec.begin(), int_vec.end());
    
    for( std::vector<A>::iterator it=A_vec.begin(); it!=A_vec.end(); ++it )
        std::cout<< it->n <<" ";
    std::cout<<std::endl;
}