#include<iostream>
using namespace std;

class newcla
{
  public:
     newcla(){cout<<"begin new class newcla!"<<endl;};
     ~newcla(){cout<<"Be over!"<<endl;}
};

int main()
{
  cout<<".............."<<endl;
  {
    newcla var;
  }
  cout<<".............."<<endl;
  return 0;
}
举个简单的例子