面向对象程序设计-C++_课时11new & delete

Dynamic memory allocation

new

new int;

new Stash;

new int[10];

new返回这个对象的指针

delete

delete p;

delete[]p;

 1 #include <iostream>
 2 using namespace std;
 3 
 4 class A
 5 {
 6 private:
 7     int i;
 8 public:
 9     A()
10     {
11         i = 0;
12         std::cout << "A::A()" << std::endl;
13     }
14     ~A()
15     {
16         std::cout << "~A::A(),i=" << i << std::endl;
17     }
18     void set(int i)
19     {
20         this->i = i;
21     }
22     void f()
23     {
24         std::cout << "hello" << std::endl;
25     }
26 };
27 
28 void main()
29 {
30     A *p = new A[10];
31 
32     for (int i = 0; i < 10; i++)
33     {
34         p[i].set(i);
35     }
36 
37     delete[]p;
38 
39     system("pause");
40 }