1. #include<bits/stdc++.h>
    2. using namespace std;
    4. /**
    5.  * 拷贝构造函数解决指针悬挂问题
    6.  * */
    8. class Person {
    9.     private:
    10.         char *name;
    11.         int age;
    12.     public:
    13.         Person(char *, int);
    14.         Person(const Person &p); // 拷贝构造函数
    15.         ~Person();
    16.         void setAge(int);
    17.         void print();
    18. };
    20. Person::Person(char *Name, int Age) {
    21.     name = new char[strlen(Name)+1];
    22.     strcpy(name, Name);
    23.     age = Age;
    24.     cout<<"construct"<<endl;
    25. }
    26. Person::~Person() {
    27.     cout<<"destruct"<<endl;
    28.     delete name;
    29. }
    30. Person::Person(const Person &p) {
    31.     name = new char[strlen(p.name)+1];
    32.     strcpy(name, p.name);
    33.     age = p.age;
    34.     cout<<"copy construct"<<endl;
    35. }
    38. void Person::setAge(int Age) {
    39.     age = Age;
    40. }
    42. void Person::print() {
    43.     printf("%s\t the address of name is %p\n", name, &name);
    44. }
    48. int main() {
    49.     Person p1("console", 21);
    50.     Person p2 = p1;
    51.     p1.setAge(1);
    52.     p2.setAge(2);
    53.     p1.print();
    54.     p2.print();
    56.     return 0;   
    57. }