2: #include using namespace std; class Date {public: Date(int,int,int); Date(int,int); Date(int); Date(); void display(); private: int month; int day; int year; }; Date::Date(int m,int d,int y):month(m),day(d),year(y) { } Date::Date(int m,int d):month(m),day(d) {year=2005;} Date::Date(int m):month(m) {day=1; year=2005; } Date::Date() {month=1; day=1; year=2005; } void Date::display() {cout< using namespace std; class Date {public: Date(int=1,int=1,int=2005); void display(); private: int month; int day; int year; }; Date::Date(int m,int d,int y):month(m),day(d),year(y) { } void Date::display() {cout< using namespace std; class Student {public: Student(int n,float s):num(n),score(s){} void display(); private: int num; float score; }; void Student::display() {cout<display(); return 0; } 5: #include using namespace std; class Student {public: Student(int n,float s):num(n),score(s){} int num; float score; }; void main() {Student stud[5]={ Student(101,78.5),Student(102,85.5),Student(103,98.5), Student(104,100.0),Student(105,95.5)}; void max(Student* ); Student *p=&stud[0]; max(p); } void max(Student *arr) {float max_score=arr[0].score; int k=0; for(int i=1;i<5;i++) if(arr[i].score>...
