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Q2/dayOfYear.cpp

Q2/dayOfYear.cpp

/*
  Name: 
  Copyright: 
  Author: 
  Date: 17/02/09 15:26
  Description: 
*/
#include   "dayOfYear.h"

DayOfYear :: DayOfYear () : day ( 1 ), month ( 1 ), year ( 2009 )
{
  /*  day  =1;
   month =1;
   year =2009;
*/
}


DayOfYear :: DayOfYear ( int  new_day ,   int  new_month ,   int  new_year )
{
   day   = new_day ;
   month  = new_month ;
   year  = new_year ;
}

void   DayOfYear :: output ()   const
{
   cout  <<   "(" <<  day  <<   " ,"    <<  month  <<   " "   <<  year  << ")" << endl ;
}

int   DayOfYear :: get_day ()
{
     return  day ;
}

int   DayOfYear :: get_month ()
{
     return  month ;
}

int   DayOfYear :: get_year ()
{
     return  year ;
}

void   DayOfYear :: set_day ( int  new_day )
{
    day  =  new_day ;
}

bool  equal ( DayOfYear  date1 ,   DayOfYear  date2 )
{
      if    (   ( date1 . day  ==  date2 . day )   &&   ( date1 . month == date2 . month )   &&   ( date1 . year  ==  date2 . year )   )
          return   true ;
      else
          return   false ;
}

Q2/dayOfYear.h

#ifndef _DAYOFYEAR_H #define _DAYOFYEAR_H #include <iostream> using namespace std; class DayOfYear{ public: friend bool equal(DayOfYear date1, DayOfYear date2);//a friend function that compares two objects //yes: if date1 is the same as date2; no: otherwise DayOfYear();//default constructor: 1/1/2009 DayOfYear(int new_day, int new_month, int new_year);// void output() const; // int get_day(); // return the value of "day" int get_month(); int get_year(); void set_DayOfYear(int new_day, int new_month, int new_year); //new_day-->day, new_month->month, new_year-->year void set_day(int new_day); // day-->new_day void set_month(int new_month); void set_year(int new_year); private: int day; int month; //int --> char * int year; }; #endif //

Q2/person.cpp

Q2/person.cpp

/*
  Name: person.cpp
  Copyright:
  Author:
  Date: 22/02/09 14:35
  Description: declaration of a new class DayOfYear
*/
#include   "person.h"
Person ::~ Person ()
{
     if   (  emails  !=  NULL  ){            
       delete   []  emails ;
      emails  =  NULL ;
     }
}

Person :: Person ()
{
    id  =   - 1 ;
    name  = "NA" ;
     //birthday = DayOfYear( 1,1, 2000);
    emails  =  NULL ;
    numEmails  =   0 ;    
}

Person :: Person ( int  new_id ,  string new_name ,   DayOfYear  date )
{
    id  =  new_id ;
    name  =  new_name ;
     //birthday = date;
    emails = NULL ;
    numEmails = 0 ;
}

/**/
Person :: Person ( const   Person   &  someone )
{
  id  =  someone . id ;
  name  =  someone . name ;
  birthday  =  someone . birthday ;
  numEmails  =  someone . numEmails ;
   //allocate space to *emails if numEmails>0
   if   ( numEmails  ==   0 )
      emails  =  NULL ;
   else {
      emails  =   new  string  [ numEmails ];
       for   ( int  i = 0 ; i < numEmails ;  i ++ )
          emails [  i  ]   =  someone . emails [  i  ];
   }  
}
/**/
/**/
void   Person :: operator   = ( const   Person   &  rhs )
{
  id  =  rhs . id ;
  name  =  rhs . name ;
  birthday  =  rhs . birthday ;
   //allocate space to *emails if needed
   if   ( numEmails  >   0 )
       delete   []  emails ;    //release the old memory
  numEmails  =  rhs . numEmails ;
  emails  =   new  string  [ numEmails ];
   for   ( int  i = 0 ; i < numEmails ;  i ++ )
          emails [  i  ]   =  rhs . emails [  i  ];  
}
/**/

void   Person :: output ()   const
{
     // id = 200;
   
    cout  <<   "--------------------------\n" ;
    cout  <<   "    id="   <<   ( * this ). id  <<   " name="   <<   this -> name  <<   " birthday=" ;
    birthday . output ();
     for   ( int  i = 0 ;  i < numEmails ;  i ++ )
        cout  <<   "email-#"   <<  i  <<   ": "   <<  emails [ i ]   ;
    cout  <<   "\n--------------------------\n\n" ;
   
   
}

int   Person :: get_id ()   const
{
     return  id ;
}

string  Person :: get_name ()   const
{
     
     return  name ;
}

const   DayOfYear   Person :: get_birthday ()   const
{
     return  birthday ;
}

void   Person :: set_id ( int  new_id )
{
    id  =  new_id ;
}

void   Person :: set_name ( string new_name )
{
    name  =  new_name ;
}

void   Person :: set_birthday ( DayOfYear  date )
{
    birthday  =  date ;
}

string  Person :: getEmail (   int  i )   const
{
         if   ( i >= 0   &&  i < numEmails )
           return  emails [ i ];
         else
             return   "NA" ;          
}

void   Person :: add_email (  string the_email )
{
       //case 1: emails list is empty
       if   (  numEmails  ==   0 ){
        emails  =   new  string [ 1 ];
         //verification
        emails [ 0 ]   =  the_email ;
       }  
       else   {   //case 2: expand the list
          string  * tmp_emails = new  string  [ numEmails ];
           for   ( int  i = 0 ;  i < numEmails ;  i ++ )    //save the emails
                tmp_emails [ i ]   =  emails [  i  ];
           delete   []  emails ;
          emails  =   new  string  [ numEmails + 1 ];   //expand the list by one
           //verify the above allocation
           for   (   int  i = 0 ;  i < numEmails ;  i ++ )
              emails [  i  ]   =  tmp_emails [  i  ];   //copy the existing emails
          emails [  numEmails  ]   =  the_email ;   // add the new email
           delete   []  tmp_emails ;
       }
      numEmails  +=   1 ;
}

int   Person :: get_num_emails ()   const
{
     return  numEmails ;
}



void  print (   const   Person &  someone )
{
    cout  <<   "****" << someone . get_id ()   <<   " "   <<  someone . get_name ()   << endl ;
}

//perform a sequential search on the studentList
bool  searchStudent (   Person   * studentList ,   int  num_students ,   int  key )
{
     for   (   int  i = 0 ;  i < num_students ;  i ++ ){
         if   (  studentList [  i  ]. get_id ()   ==  key  ) //found
             return   true ;
     } //for (i)
     return   false ;   //none of the students has ID=key
}

bool  sameID ( const   Person &  person1 ,   const   Person &  person2 )
{
     return   ( person1 . get_id ()   ==  person2 . get_id ());
}

bool  equalID ( const   Person &  person1 ,   const   Person &  person2 )
{
     return   ( person1 . id  ==  person2 . id );
}

Q2/person.h

//person.h #ifndef _PERSON_H #define _PERSON_H #include <iostream> #include <string> #include "dayOfYear.h" using namespace std; class Person{ public: //equalID() returns true:have the same ID; false: otherwise friend bool equalID(const Person & person1, const Person &Person2);// ~Person(); //destructor: to release any memory that has been allocated to the object Person(); //default constructor: id=-1, name="NA", birthday="1/1/2000" Person( int new_id, string new_name, DayOfYear date); //constructor that initializes //id to new_id, name to new_name, and birthday to date Person(const Person & someone); //copy constructor: construct a new object as a copy of "someone" void operator= (const Person &rhs); //assign the object on the right-hand-side to the left-hand-side virtual void output() const; //print out a person's info. int get_id() const; //return the id of a Person object string get_name() const; //return the name of a Person object const DayOfYear get_birthday() const; //return the birthday of a Person object string getEmail( int i) const; //return the i-th email if exists; o.w: return "NA" void set_id(int new_id); //change a person's id to new_id void set_name(string new_name); // change a person's name to new_name void set_birthday(DayOfYear new_Date); //change a person's birthday to new_date void add_email( string the_email); //add the_email to the list int get_num_emails() const; private: int id; string name; DayOfYear birthday; string *emails; //list of email addresses int numEmails; }; void print( const Person& someone); //print out a person's id and name bool sameID(const Person& person1, const Person& person2);//true:have the same ID; false: otherwise //search whether there exists a student on the studentList with id=key bool searchStudent( Person *studentList, int num_students, int key); #endif

Q2/personnel.cpp

Q2/personnel.cpp

/*
  Name: personnel.cpp
  Copyright: 
  Author: 
  Date: 22/02/09 15:02
  Description: manage a personnel database that currently consists of one employee Mary
*/

#include   "dayOfYear.h"
#include   "person.h"
#include   "student.h"

int  main ()
{
     DayOfYear  date ( 20 ,   7 ,   1985 );
    
     Person  mary_p (   101 ,   "Mary" ,  date );
     Student  mary_s (   101 ,   "Mary" ,  date ,   1 ),  mary_c ;
    // Person & mary_p = mary_s;
    
     Person   &  person1  =  mary_s ;
    
    mary_s . output ();   //student verion
    person1 . output ();  
    
     /*
    mary_p.output(); 
    mary_s.Person::output();//person version 
    
    print( mary_s );
    
    mary_s.add_email("[email protected]");
    mary_s.set_num_grades(2);
    mary_s.set_grade(1, 98.00);
    mary_s.set_grade(2, 100.00);
    
    mary_c = mary_s;
    
    cout << mary_s;
    cout << mary_c;
    */
    //mary_clone.set_id(202);
    // print(mary_clone);
     //mary_clone.output();
    
    // mary = mary_clone;
    // mary.output();
    
    //sameID(mary, mary_clone);
    // equalID(mary, mary_clone);
     /**the code below create a dynamic array of Person
    ***
    //1 & 2:
    Person *students213 = NULL; //
    int num = 200; //size of the dynamic array *students213
    
    //3. allocate memory to students213
    students213 = new Person [ num ]; 
    
    //4. verify 
    if (students213 == NULL ){
       cerr << "Memory allocation failure.\n";
       exit( -1 );
    }
    //5: use
    for (int i=0; i<num; i++){
        students213[ i ].set_id( i + 100);
        students213[ i ].output();
    } 
    
    //search based on id 
    cout << "Is there a student with ID=207? ";
    if (searchStudent( students213, num, 207) )
       cout << " Yes."<<endl;
    else
        cout << " No. "<<endl; 
    
    cout << "Is there a student with ID=507? ";
    if (searchStudent( students213, num, 507) )
       cout << " Yes."<<endl;
    else
        cout << " No. "<<endl; 
    
    //6&7: release the memory   
    delete [] students213;
    students213 = NULL; 
    *****
    **end of the dynamic array students213
    **************************************/   
     return   0 ;
}

Q2/student.cpp

Q2/student.cpp

//File name--student.cpp: implementation file for the Student class
#include   "student.h"
//#include "dayOfYear.h"

//destructor
Student ::~ Student ()
{
    if   ( grades  !=  NULL  ){
       delete   []  grades ;
    }
}

//default constructor
Student :: Student () : Person ()
{
    //call the constructor of the base class to initialize the inherited members
   level  =   1 ;   //freshmen
   num_grades  =   0 ;
   grades  =  NULL ;
}

//a second constructor
Student :: Student ( int  new_id ,  string new_name ,   DayOfYear  date ,   int  lvl ) : Person ( new_id ,  new_name ,  date ), level ( lvl ), num_grades ( 0 ), grades ( NULL )
{
  //call the corresponding constructor in the 
  //base class to initialize the inherited members
  /*  level = lvl;
   num_grades = 0;
   grades = NULL;   
 */
}

//copy constructor
Student :: Student ( const   Student   &  std ) : Person ( std )   //call the copy constructor of the base class
{
   
    level  =  std . level ;
    num_grades  =  std . num_grades ;
     if   ( num_grades  <=   0 )
       grades  =  NULL ;
     else {   //allocate space to *grades and copy the grades from std
        ( * this ). grades  =   new   double   [  num_grades  ];
        if   ( grades  ==  NULL  ){
           cerr <<   "Student:Student(const Student &): Memory allocation error\n" ;
           exit (   - 1   );
        }
        for   ( int  i = 0 ;  i < num_grades ;  i ++ )
           grades [  i  ]   =  std . grades [  i  ];
     }
}

void   Student :: operator = (   const   Student   &  rhs )
{
      ( * this ). Person :: operator = ( rhs );
     level  =  rhs . level ;
      if   ( num_grades  !=  rhs . num_grades ){
         delete   []  grades ;
        num_grades  =  rhs . num_grades ;
        grades  =   new   double [  num_grades  ];
         if   ( grades  ==  NULL ){
           cerr <<   "Student:operator=(const Student &): Memory allocation error\n" ;
           exit (   - 1   );
         }
         for   ( int  i = 0 ;  i < num_grades ;  i ++ )
           grades [  i  ]   =  rhs . grades [  i  ];
      }   
}

int   Student :: get_level ()   const
{
     return  level ;
}

int   Student :: get_num_grades ()   const
{
     return  num_grades ;
}

double   Student :: get_grade (   int  i )   const
{
     if   ( i < 1   ||  i > num_grades )  
        return   - 1.0 ;   //non-existent grade
     else
         return  grades [  i - 1   ];
}

void   Student :: set_level ( int  lvl )
{
   level  =  lvl ;
}

void   Student :: set_num_grades ( int  num )
{
   num_grades  =  num ;
    if   ( num  >   0 ){
      grades  =   new   double   [  num  ];
       if   ( grades  ==  NULL  ){
         cerr <<   "Student:set_num_grades(int ): Memory allocation error\n" ;
         exit (   - 1   );
       }
       for   ( int  i = 0 ;  i < num ;  i ++ )
         grades [  i  ]   =   0 ;
    }
}

void   Student :: set_grade ( int  i ,   double  grd )
{
     if   ( i >= 1   &&  i <= num_grades )  
       grades [  i - 1   ]   =  grd ;
}

ostream &   operator << ( ostream &  out ,   const   Student &  std )
{
    DayOfYear  bday ;
   bday  =  std . get_birthday ();
   
   out  <<   "------------------------------\n" ;
   out  <<   "id="   <<  std . get_id ()   << endl ;
   out    <<   "name="   <<  std . get_name ()   <<  endl ;
   out  <<   "birthday="   <<  bday . get_day ();  
   out  <<   "-"   <<  bday . get_month ();
   out  <<   "-"   <<  bday . get_year ()   <<  endl ;
   out  <<   "#emails="   << std . get_num_emails () << endl ;
   out  <<   " 1st email="   <<  std . getEmail ( 0 ) << endl ;
   out  <<   "level=" << std . level << endl ;
   out  <<   "#grades=" <<  std . num_grades  << endl ;  
    for   ( int  i = 1 ;  i <= std . num_grades ;  i ++ )
        out  <<   "grade["   <<  i  << "]="   <<  std . grades [ i - 1 ]   << " " ;
   out  << endl ;
   out  <<   "------------------------------\n" ;   
   
    return  out ;     
}


void   Student :: output ()   const
{
      DayOfYear  bday ;
   bday  =  get_birthday ();
   
   cout  <<   "------------------------------\n" ;
   cout  <<   "id="   <<  get_id ()   << endl ;
   cout    <<   "name="   <<   get_name ()   <<  endl ; //private-is-private rule 
   cout  <<   "birthday="   <<  bday . get_day ();  
   cout  <<   "-"   <<  bday . get_month ();
   cout  <<   "-"   <<  bday . get_year ()   <<  endl ;
   cout  <<   "#emails="   << get_num_emails () << endl ;
   cout  <<   " 1st email="   <<  getEmail ( 0 ) << endl ;
   cout  <<   "level=" << level << endl ;
   cout  <<   "#grades=" <<  num_grades  << endl ;  
    for   ( int  i = 1 ;  i <= num_grades ;  i ++ )
        cout  <<   "grade["   <<  i  << "]="   <<  grades [ i - 1 ]   << " " ;
   cout  << endl ;
   cout  <<   "------------------------------\n" ;   
   
}

Q2/student.h

//File name--student.h: declare Student as a derived class of Person #ifndef _STUDENT_H #define _STUDENT_H #include "person.h" class Student:public Person { public: ~Student(); //destructor Student(); //default: 1->level, 0->num_grades, NULL->grades Student(int new_id, string new_name, DayOfYear date, int lvl ); //lvl->level, 0->num_grades, NULL->grades Student(const Student& std); //copy constructor: std -->*this void operator=(const Student& rhs); //rhs --> *this int get_level() const; //return level int get_num_grades() const; //return num_grades double get_grade(int i) const; //return grades[i] void set_level(int lvl); //lvl-->level void set_num_grades( int num); //num->num_grades, allocate memory to *grades void set_grade(int i, double grd); //grd --> grades[i] friend ostream & operator <<( ostream & out, const Student& std); virtual void output() const; //print out a student's info. private: int level; //1-4: freshmen, sophomore, junior and senior int num_grades; double *grades; }; #endif //_STUDENT_H

Q1/9.cpp

#include <iostream> #include "figure.h" #include "rectangle.h" #include "triangle.h" using std::cout; int main() { Triangle tri; tri.draw(); cout << "\nDerived class Triangle object calling" << " center().\n"; tri.center(); Rectangle rect; rect.draw(); cout << "\nDerived class Rectangle object calling" << " center().\n"; rect.center(); return 0; }