两个基类加传参 :Worker(name), Children(age)

初始化列表：

ChildLabourer(string name, int age):Worker(name),Children(age)

class ChildLabourer:public Worker,public Children

{

public:

ChildLabourer(string name, int age):Worker(name),Children(age)

{

cout << "ChildLabourer" << endl;

}

~ChildLabourer()

{

cout << "~ChildLabourer" << endl;

}

};

class ChildLabourer:public Worker,public Children

{

public:

ChildLabourer(string name="Jack", int age=21):Worker(name),Children(age)

{

cout << "ChildLabourer" << endl;

}