Why do these getters not return the correct values?

See more:

C++

The getters return garbage data even though the "Person" instance seems to contain the right data when I check in the debugger:

Name: P÷        ☺, Age: 2019912769

std::unique_ptr<Person> person(new Person());

printf("Name: %s, Age: %d\n", person->getName(), person->getAge());

#include <string>

using string = std::string;

class Person
{
public:
    Person() : name("Alex"), age(22) { }
    
    void change(const string& name, const int age)
    {
        this->name = name;
        this->age = age;
    }

    const string getName() { return name; }
    const int getAge() { return age; }

private:
    string name;
    int age;
};

What I have tried:

Searching the internet for an explanation why this happens