Thread: class constructor

Hi,
i got a class:

Code:

class base{
private:
	int age;
public:
	base(int);
};

The constructor can be:
method A:

Code:

base::base(int _age):age(_age){
}

method B:

Code:

base::base(int _age){
    age=_age;
}

are both the methods correct? is it correct in c++ to use method B?

do clarify.
thanks