理解虚基类的作用、定义及其构造函数的调用。请阅读以下程序并在注释处补全代码，然后写出程序运行结果。

理解虚基类的作用、定义及其构造函数的调用。请阅读以下程序并在注释处补全代码，然后写出程序运行结果。

class Person {
    string IdPerson;
    string Name;
public:
    Person(string, string);
    Person();
    ~Person();
    void PrintPersonInfo();
};
Person::Person(string id, string name) {
    IdPerson = id;
    Name = name;
    cout << "构造Person" << endl;
}
Person::Person() {
cout << "构造Person"<<endl;
IdPerson = '\0'; 
Name = '\0';
}
Person::~Person() {
    cout << "析构Person" << endl;
}
void Person::PrintPersonInfo() {
    cout << "身份证号:" << IdPerson << endl << "姓名:" << Name << endl;
}
class Student :public virtual Person {
    string NoStudent;
    string CourseName;
    float Grade;
public:
    Student(string id, string name, string nostud, string coursename, float grade);
    Student();
    ~Student() { cout << "析构Student" << endl; }
    void PrintStudentInfo();
};
Student::Student(string id, string name, string nostud, string coursename, float grade)
    :Person(id, name) {
    NoStudent = nostud;
    CourseName = coursename;
    Grade = grade;
    cout << "构造 Student" << endl;
}
void Student::PrintStudentInfo() {
    PrintPersonInfo();
    cout << "学号:" << NoStudent << endl << "课程名:" << CourseName << endl << "成绩:" << Grade <<
        endl;
}
class Employee:public virtual Person {
    string NoEmployee;
    string Title;
public:
    Employee(string id, string name, string noemplyee, string title);
    ~Employee() { cout << "析构Employee" << endl; }
    void PrintEmployeeInfo();
};
Employee::Employee(string id, string name, string noemplyee, string title)
    :Person(id, name) {
    NoEmployee = noemplyee;
    Title = title;
    cout << "构造Employee" << endl;
}
void Employee::PrintEmployeeInfo() {
    cout << "教职工号:" << NoEmployee << endl << "职称:" << Title << endl;
}
class EStudent :public Employee, public Student {
    string NoEStudent;
public:
    EStudent(string id, string name, string nostudent, string coursename, float grade, string noemployee, string title, string noestud);
    ~EStudent() { cout << "析构EStudent" << endl; }
    void PrintEStudentInfo();
};
//补充代码，EStudent类有参构造函数的实现
void EStudent::PrintEStudentInfo() {
    PrintStudentInfo();
    PrintEmployeeInfo();
    cout << "在职学习号:" << NoEStudent << endl;
}
int main() {
    EStudent estu1("320102811226161", "朱海鹏", "Stu201707001", "数据库", 98, "Tch003", "副教授", "EStuO01");
    return 0;
}