overloading ++ --

[mickey]

Hi, I overloading ++ and -- (postfix and prefix way) for my class Person with attributes _age, _name and _sex; but I have some problems and warning; ++ on Person must to increment the _age; both them incremet properly the objects Person.....

const Person& operator++() { //prefix //this seems me OK
        _age++;
        return *this;
    }
 
    const Person& operator++(int) { //postfix
        Person before; 
        _age++;
        return before;
    }
warning person.h:37: warning: reference to local variable `before' returned

const Person& operator++() { //prefix //this seems me OK
        _age++;
        return *this;
    }
    
    const Person& operator++(int) { //postfix
        Person before; 
        _age++;
        return before;
    }
warning person.h:37: warning: reference to local variable `before' returned

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Is the second good (at the moment I'd like avoid "friend" member) ? Is a way to keep out that boring "warning", please?