c++中对象析构顺序研究

#include <iostream>
using namespace std;

class Test
{
public:
  Test(int dt=0){data=dt;}
  ~Test(){cout<<data<<endl;}
private:
  int data;
};

int w(void)
{
  Test b(7);
  Test c(8);
}

int main(int argc,char **argv)
{
  Test a(0);
  if(1==1)
  {Test a(1);Test b(2);}

  w();

  if(1==1)
  {Test a(3);Test b(4);}
  Test c(5);
  return 0;
}

#include <iostream>
using namespace std;

class Test
{
public:
  Test(int dt=0){data=dt;cout<<data<<":construct"<<endl;}
  ~Test(){cout<<data<<":desctruct"<<endl;}
private:
  int data;
};

class Test2
{
public:
  Test2(int dt=0):a(1),b(2){data=dt;}
  ~Test2(){cout<<data<<":Test2"<<endl;}
private:
  int data;
  Test a;
  Test b;
  static Test c;
  static Test d;
};

Test Test2::c(3);
Test Test2::d(4);

int main(int argc,char **argv)
{
  Test2 e; 
  return 0;
}