类对象与静态，局部，全局变量的关系

#include<iostream>
using namespace std;
class Student {
private:
  string name;
  string ID;
  char sex;
public:
  Student(string n, string I, char s) {
    name = n;
    ID = I;
    sex = s;
    cout << "对象" << name << "-" << ID << "的构造函数" << endl;
  }
  ~Student() {
    cout << "对象" << name << "-" << ID << "的析构函数" << endl;
  }
};
Student s1("全局对象", "100", '?');
Student s6("全局对象", "106", '?');
void fun() {
  Student s2("局部自动对象", "101", 'm');
  Student s4("局部自动对象", "103", 'm');
  static Student s3("静态局部对象", "102", 'w');
  static Student s5("静态局部对象", "105", 'w');
}
int main()
{
  fun();
}