帮忙给下面每一行代码注释# include < iostream > # include < cstring > using namespace std ; classStudentID｛ public : StudentID ( int id = 0 ) ｛ value = id; cout<<"Assigning student id "<<value <<endl; ｝ ~StudentID() ｛ cout<<"Destructing id "<<value <<endl; ｝ private: int value; ｝; class Student｛ public: Student (char* pName = "no name", int ssID =0):id(ssID) ｛ cout<<"Constructing student"<<pName <<endl; strncpy(name, pName, sizeof(name)); name [sizeof(name)-1] ='\n'; ~Student() ｛cout<<"Deconstructing student "<<name<<endl;｝ protected: char name[20]; StudentID id; ｝; int main（） ｛ Student s("wang",9901); Student t("li"); cout<<"－－－－－－－－－－"<<endl; return 0; ｝

// 包含iostream和cstring头文件
#include <iostream>
#include <cstring>

// 命名空间
using namespace std;

// 学生ID类
class StudentID {
public:
// 构造函数，初始化value值并输出信息
StudentID(int id = 0) {
value = id;
cout << "Assigning student id " << value << endl;
}
// 析构函数，输出信息
~StudentID() {
cout << "Destructing id " << value << endl;
}
private:
int value;
};

// 学生类
class Student {
public:
// 构造函数，初始化name和id并输出信息
Student(char* pName = "no name", int ssID = 0) : id(ssID) {
cout << "Constructing student " << pName << endl;
strncpy(name, pName, sizeof(name));
name[sizeof(name) - 1] = '\n';
}
// 析构函数，输出信息
~Student() {
cout << "Deconstructing student " << name << endl;
}
protected:
char name[20];
StudentID id;
};

// 主函数
int main() {
// 创建两个学生对象并输出信息
Student s("wang", 9901);
Student t("li");
// 输出分隔线
cout << "-----------------" << endl;
return 0;
}