c++之析构函数

#include<iostream>
using namespace std;
class A
{
   public:
    A(){cout<<"A construction\n";}//构造函数
    ~A(){cout<<"A Destruction\n";}//析构函数
};
int main() {
 cout<<"构造a\n";
  A a;
  cout<<"构造pb\n";
  A *pb=new A;
  cout<<"--------------\n";
  {
   cout<<"构造c\n";
  A c;//生命周期在大括号内
  cout<<"析构c\n";
  }
  cout<<"------------------\n";
  cout<<"析构pb\n";
  delete pb;
  cout<<"析构a\n";
  return 0;
return 0;}

结果：

构造a
A construction
构造pb
A construction
--------------
构造c
A construction
析构c
A Destruction
------------------
析构pb
A Destruction
析构a
A Destruction

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Process exited after 0.1611 seconds
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