1 #include
     
       2 using namespace std; 3  4 class stu 5 { 6     public: 7         stu() 8         { 9             puts("stu无参构造函数调用"); 10         }11         12         stu(int age)13         {14             s_age = age;15             puts("stu有参构造函数调用");16         }17         18         stu(const stu &s)19         {20             //将传入的学生的所有属性全部拷贝到我身上 21             s_age = s.s_age;22             puts("stu拷贝构造函数调用");23         }24         ~stu()25         {26             puts("stu析构函数调用");27         }28         int s_age;29 };30 //调用 31 void test()32 {33 34     stu s2(10); //有参构造函数调用35     stu s3(s2);//拷贝构造函数调用36     cout << "s2 age is " << s2.s_age << endl;37     cout << "s3 age is " << s3.s_age << endl;38 }39 40 void work(stu s)41 {42     43 }44 void test01()45 {46     stu s;47     work(s);48 }49 50 stu go()51 {52     stu p1;53     cout << (int*)&p1 << endl;54     return p1;55 }56 57 void test02()58 {59     stu w = go();60     cout << (int*)&w << endl;61 }62 int main()63 {64     //test();65     //test01();66     test02();67     return 0;68 }