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#include<iostream> #include<string> using namespace std; class Person { public: Person(const char* name = "abc") :_name(name) { cout << "Person()" << endl; } Person(const Person& pp) :_name(pp._name) { cout << "Person(const Person&)" << endl; } Person& operator=(const Person& pp) { cout << "Person& operator=(const Person&)" << endl; if (this != &pp) { _name = pp._name; } return *this; } ~Person() { cout << "~Person()" << endl; } protected: string _name; }; class Student :public Person { public: Student(const char* name, int num) :Person(name) , _num(num) { cout << "Student()" << endl; } Student(const Student& A) :Person(A) , _num(A._num) { cout << "Student(const Student& A)" << endl; } Student& operator=(const Student& A) { cout << "Student& operator=(const Student& A)" << endl; if (this != &A) { Person::operator=(A); _num = A._num; } return *this; } ~Student() { cout << "~Student()" << endl; } private: int _num; }; void test() { Student a1("peter", 20); Student a2(a1); a2 = a1; } int main() { test(); return 0; } |
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原文链接：http://blog.csdn.net/weixin_36125166/article/details/55212432
