[c++]怎么样知道析构函数先后的析构顺序

#include<iostream>
#include<string.h>
using namespace std;
class String_date
{
private:
    char * str;
public:
    String_date(char * str);
    ~String_date();
    char* get_infor()
    {return str;}
};
String_date::String_date(char* s)
{
    cout<<"constructing:"<<endl;
    str = new char [strlen(s) + 1];
    strcpy(str,s);
}
String_date::~String_date()
{
    delete str;
    cout<<"destructing:"<<str<<endl;//只要在析构函数中加入有效的打印语句就可以辨别
}
int main()
{
    String_date str1("teacher");
    String_date str2("student");
    cout<<str1.get_infor()<<endl;
    return 0;
}

运行结果：