// fig11_02.cpp
// Demonstrating unique_ptr.
#include <fmt/format.h>
#include <iostream>
#include <memory>

class Integer {
public:
   // constructor
   Integer(int i) : value{i} {
      std::cout << fmt::format("Constructor for Integer {}\n", value);
   }

   // destructor
   ~Integer() {
      std::cout << fmt::format("Destructor for Integer {}\n", value);
   }

   int getValue() const { return value; } // return Integer value
private:
   int value{0};
};

// use unique_ptr to manipulate Integer object
int main() {
   std::cout << "Creating a unique_ptr that points to an Integer\n";

   // create a unique_ptr object and "aim" it at a new Integer object 
   auto ptr{std::make_unique<Integer>(7)};

   // use unique_ptr to call an Integer member function
   std::cout << fmt::format("Integer value: {}\n\nMain ends\n",
      ptr->getValue());
}




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