Question

How to use unique_ptr to automatically deleted an object when the pointer get out of scope in C++

Answer 1

#include <iostream>
#include <memory>

class Example {
public:
    Example() {
         std::cout << "Example()" << "\n";
    }
     
    ~Example() {
         std::cout << "~Example()" << "\n";
    }
};

int main() {
    {
        std::unique_ptr<Example> ex(new Example());
    }
}
   
   
   
   
/*
run:
   
Example()
~Example()
   
*/

 

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Answer 2

#include <iostream>
#include <memory>

class Example {
public:
    Example() {
         std::cout << "Example()" << "\n";
    }
     
    ~Example() {
         std::cout << "~Example()" << "\n";
    }
};

int main() {
    {
        std::unique_ptr<Example> ex = std::make_unique<Example>();
    }
}
   
   
   
   
/*
run:
   
Example()
~Example()
   
*/

 

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