#include<memory>
#include<iostream>
//Create ref function w reference and pointer parameter 
void ref_ptr(int* num, int* num1);

//Create return pointer function

void use_smart_pointer(std::unique_ptr<int>& num)
std::unique_ptr<int>get_smart_pointer()
{
    std::unique_ptr<int> num = std::make_unique<int>(500);

    return num;
}