C++ class入门

 1 #include <iostream>
 2 using namespace std;
 3 
 4 class as
 5 {
 6     public:
 7     int a;
 8     const int b;
 9     as():b(2)
10     {
11         a = 1;
12     }
13     ~as()
14     {
15         cout << "析构函数被调用！" << endl;
16     };
17 
18     
19     private:
20     int c;
21     
22 };
23 
24 int main(int argc, char *argv[])
25 {
26     as b;
27     as c;
28     cout << b.a << endl;
29     cout << b.b << endl;
30     
31     return 0;
32 }

 1 #include <iostream>
 2 using namespace std;
 3 
 4 class A
 5 {
 6     public:
 7     A()
 8     {
 9         cout << "A()" << endl;
10     }
11     
12     ~A()
13     {
14         cout << "~A()" << endl;
15     }
16 };
17 
18 int main(int argc, char *argv[])
19 {
20     A a;
21     A* p = new A[3]; //不会自动释放 
22     return 0;
23 }