/*作业,定义一个学生类*//*数据成员：学号、姓名、数学、英语、计算机三科成绩*成员函数：求总成绩、求三科平均成绩、输出学生信息*新增一个生日类  2018.4.2*/#include 
     
      #include 
      
       using namespace std;class Data{public:    Data();    Data(int ye, int mon, int da);    Data(Data &da);    void inf();private:    int year;    int month;    int day;};class Student {
    //define a class called "Student"public:    Student(int num, string na, int ma, int en, int cs, Data tp);    //constructors    Student(Student &stu);                                  //Copy constructors    ~Student();    int sum();//the sum grade    int ave();//calculate the average grade    void show();//show the details of the studentprivate:    Data birthday;    int number;    string name;    int math;    int eng;    int com;};Data::Data(){    year = 1998;    month = 8;    day = 3;}Data::Data(int ye = 0, int mon = 0, int da = 0){    year = ye;    month = mon;    day = da;}Data::Data(Data &da){    cout << endl << "Warnning:This Copy constructors.!!!" << endl;    year = da.year;    month = da.month;    day = da.day;}void Data::inf(){    cout << "Birthday:" << year << "/" << month << "/" << day << endl;}//the realization of classStudent::Student(int num, string na, int ma, int en, int cs, Data tp) :birthday(tp) {    number = num;    name = na;    math = ma;    eng = en;    com = cs;}Student::~Student(){}Student::Student(Student &stu) :birthday(stu.birthday) {    cout << endl << "Warnning:This Copy constructors.!!!" << endl;    number = stu.number;    name = stu.name;    math = stu.math;    eng = stu.eng;    com = stu.com;}int Student::sum() {    return math + eng + com;}int Student::ave() {    return (math + eng + com) / 3;}void Student::show() {    cout << "Number:" << number << endl;    cout << "Name:" << name << endl;    birthday.inf();    cout << "Math score:" << math << endl;    cout << "English score:" << eng << endl;    cout << "Computer score:" << com << endl;    cout << "Sum score:" << sum() << endl;    cout << "Average score:" << ave() << endl;}//the mainint main() {    Data tmp(2012, 12, 02);    Student noob(001, "!#%$#^$%^", 90, 89, 88, tmp);//Initialization                                                    //output    noob.show();    Student newbie(noob);   //Copy constructors    newbie.show();    return 0;}
      
     

• 测试结果