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C++ Program to implement Virtual Class by using Multipath Inheritance – Q23
Q23. Program to implement Virtual Class by using Multipath Inheritance:
Issue the books to various members of library.
– Member-Membername, Age, Address
– Faculty (derived from member classs)- Department and integer type array for issuing books with upperlimit 10.
– Student (derived from member class)- Class, Rollno and integer type array for issuing books with upperlimit 4.
Daily Transaction (derived from Faculty and Student classes)- date of issue, date of return (calculated from date of issue as 15 days for students and 45 days for a faculty).
… from College notes (BCA/MCA assignments):
#include <iostream.h>
#include <conio.h>
#include <string.h>
#include <stdlib.h>
#include <dos.h>
class CDATE{
private:
int dd;
int mm;
int yy;
public:
struct date d;
CDATE(){
getdate(&d);
dd = d.da_day;
mm = d.da_mon;
yy = d.da_year;
}
CDATE(int d, int m, int y){
dd = d;
mm = m;
yy = y;
}
};
class CMember{
protected:
char m_name[20], m_add[30];
int m_age;
public:
CMember(){}
CMember(char *Mnam, char *Madd, int Mage){
strcpy(m_name, Mnam);
strcpy(m_add, Madd);
m_age = Mage;
}
};
class CFaculty : public virtual CMember{
protected:
char f_dept[20];
int f_bk_issue;
public:
CFaculty(){}
CFaculty(char *Fdept, int Fiss){
strcpy(f_dept, Fdept);
f_bk_issue = Fiss;
}
};
class CStudent : public virtual CMember{
protected:
char s_clas[10];
int s_roll, s_bk_issue;
public:
CStudent(){}
CStudent(char *Sclas, int Sroll, int Siss){
strcpy(s_clas, Sclas);
s_roll = Sroll;
s_bk_issue = Siss;
}
};
class CTrans: public CFaculty , public CStudent{
private:
CDATE dt;
int dayStu;
int dayFac;
char bk_name[20];
public:
CTrans(){
dayStu = 15;
dayFac = 45;
}
CTrans(char *Tnam, char *Tadd, int Tage, char *Tdept,
int Tiss, char *Tbk_nam, CDATE Tdoi)
: CMember(Tnam, Tadd, Tage), CFaculty(Tdept, Tiss){
strcpy(bk_name, Tbk_nam);
dt = Tdoi;
}
CTrans(char *Tnam, char *Tadd, int Tage, char *Tclas,
int Troll, int Tiss, char *Tbk_nam, CDATE Tdoi)
: CMember(Tnam, Tadd, Tage), CStudent(Tclas, Troll,
Tiss){
strcpy(bk_name, Tbk_nam);
dt = Tdoi;
}
void Fac_Show(){
cout<<"\n Faculty Details";
cout<<"\n Name: "<<m_name;
cout<<"\n Address: "<<m_add;
cout<<"\n Age: "<<m_age;
cout<<"\n Department: "<<f_dept;
cout<<"\n Total Books to Issue: "<<f_bk_issue;
cout<<"\n Book name: "<<bk_name;
}
void Stu_Show(){
cout<<"\n Student Details";
cout<<"\n Name: "<<m_name;
cout<<"\n Address: "<<m_add;
cout<<"\n Age: "<<m_age;
cout<<"\n Class: "<<s_clas;
cout<<"\n Total Books to Issue: "<<s_bk_issue;
cout<<"\n Book name: "<<bk_name;
}
};
void main(){
int ch;
char book_name[20];
CTrans ObjLib;
while(1){
clrscr();
cout<<"\n LIBRARY MANAGEMANT";
cout<<"\n ~~~~~~~~~~~~~~~~~~";
cout<<"\n 1 -> Issue Books to Faculty.";
cout<<"\n 2 -> Issue Books to Student.";
cout<<"\n 3 -> Show Details of Faculty.";
cout<<"\n 4 -> Show Details of Student.";
cout<<"\n 5 -> EXIT.";
cout<<"\n Enter your choice: ";
cin>>ch;
switch(ch){
case 1:
cout<<"\n Enter Book Name: ";
cin>>book_name;
CDATE dt1(5, 10, 2004);
CTrans Olib1("Manoj", "Dwarka", 23,
"Computer", 15, book_name, dt1);
break;
case 2:
cout<<"\n Enter Book Name: ";
cin>>book_name;
CDATE dt2(5, 10,2004);
CTrans Olib2("Nitin", "Dwarka", 24, "MCA",
214, 5, book_name, dt2);
break;
case 3:
ObjLib.Fac_Show();
break;
case 4:
ObjLib.Stu_Show();
break;
default:
exit(1);
} // end of switch.
getch();
} // end of while.
} // end of main.
Output:
LIBRARY MANAGEMANT: –
~~~~~~~~~~~~~~~
1 -> Issue Books to Faculty.
2 -> Issue Books to Student.
3 -> Show Details of Faculty.
4 -> Show Details of Student.
5 -> EXIT.
Enter your choice: 2
Name: Manoj
Address: Dwarka
Age: 23
Course: MCA
Enter Book Name: c plus plus
LIBRARY MANAGEMANT: –
~~~~~~~~~~~~~~~
1 -> Issue Books to Faculty.
2 -> Issue Books to Student.
3 -> Show Details of Faculty.
4 -> Show Details of Student.
5 -> EXIT.
Enter your choice: 4
Student Details: –
Name: Manoj
Address: Dwarka
Age: 23
Course: MCA
Total Books to Issue: 4
Book name: CPP
C++ Program to implement Multiple Inheritance – Q22
Q22. Program to implement Multiple Inheritance:
Display the digital clock using multiple inheritance. Using a time and date class, for deriving the class digiclock. Use appropriate functions to increment date and time.
… from College notes (BCA/MCA assignments):
#include <iostream.h>
#include <conio.h>
#include <dos.h>
class CDate{
protected:
int dd, mm, yy;
struct date d;
public:
void initDate(){
getdate(&d);
dd = d.da_day;
mm = d.da_mon;
yy = d.da_year;
}
void showDate(){
initDate();
cout<<dd<<" / "<<mm<<" / "<<yy;
}
};
class CTime{
protected:
int hrs, min, sec;
struct time t;
public:
void initTime(){
gettime(&t);
hrs = t.ti_hour;
min = t.ti_min;
sec = t.ti_sec;
}
void showTime(){
initTime();
cout<<hrs<<" : "<<min<<" : "<<sec;
}
};
class CDigiClock : public CDate, public CTime{
public:
CDigiClock(){
showDate();
cout<<"\t";
showTime();
}
};
void main(){
clrscr();
cout<<" Current Date and Time is : - \n";
while(!kbhit()){
gotoxy(5, 5);
CDigiClock();
}
}
Output:
Current Date and Time is : –
18 / 11 / 2004 21 : 55 : 51
C++ Program to implement Hierarchical Inheritance (Part 2) – Q21
Q21. Program to implement Hierarchical Inheritance (Part 2):
A university is associated with three different kinds of students Undergraduate , Post-Graduate and Doctoral.
– Undergraduate students have grades awarded to the for individual subjects.
– Postgraduate students sit for 8 papers and deliver a seminar. They are awarded grades for these.
– Doctoral students sit for 4 papers and write a thesis. They are awarded grades for the papers but for the thesis the evaluation is only whether the thesis is accepted or not.
… from College notes (BCA/MCA assignments):
#include <iostream.h>
#include <stdlib.h>
#include <conio.h>
enum boolean {false, true};
class Cstud{
protected:
char name[20];
};
class Cunderg : public Cstud{
private:
int papers[5];
char grade;
public:
int tot, avg;
void getdata(){
cout<<"\n Enter Name: ";
cin>>name;
cout<<"\n Enter Marks in 5 Subjects: -"<<endl;
tot = 0;
for(int i=0; i<5; i++){
cin>>papers[i];
tot += papers[i];
}
avg = tot / 5;
if(avg >= 80 && avg < 100) grade = 'A';
else if(avg > 60 && avg < 80) grade = 'B';
else if(avg > 40 && avg < 60) grade = 'C';
else grade = 'D';
}
void showdata(){
cout<<"\n Name: "<<name;
cout<<"\n Total Marks: "<<tot;
cout<<"\n Grade: "<<grade;
}
};
class Cpostg : public Cstud{
private:
int papers[8], sem;
char grade;
public:
int tot;
void getdata(){
cout<<"\n Enter Name: ";
cin>>name;
cout<<"\n Enter Marks in 8 Subjects: -"<<endl;
tot = 0;
for(int i=0; i<8; i++){
cin>>papers[i];
tot += papers[i];
}
cout<<"\n Enter Marks of Seminar: ";
cin>>sem;
if(sem >= 80 && sem < 100) grade = 'A';
else if(sem > 60 && sem < 80) grade = 'B';
else if(sem > 40 && sem < 60) grade = 'C';
else grade = 'D';
}
void showdata(){
cout<<"\n Name: "<<name;
cout<<"\n Total Marks in 8 Papers: "<<tot;
cout<<"\n Seminar Score: "<<sem;
cout<<"\n Grade: "<<grade;
}
};
class Cdoctor : virtual public Cstud{
private:
int papers[4];
boolean thesis;
char grade;
public:
int tot, avg;
char ch;
void getdata(){
cout<<"\n Enter Name: ";
cin>>name;
cout<<"\n Enter Marks in 4 Subjects: -"<<endl;
tot = 0;
for(int i=0; i<4; i++){
cin>>papers[i];
tot += papers[i];
}
avg = tot / 4;
if(avg >= 80 && avg < 100) grade = 'A';
else if(avg > 60 && avg < 80) grade = 'B';
else if(avg > 40 && avg < 60) grade = 'C';
else grade = 'D';
cout<<"\n Is the Thesis Accepted (y/n): ";
cin>>ch;
if(ch == 'y') thesis = true;
else thesis = false;
}
void showdata(){
cout<<"\n Name: "<<name;
cout<<"\n Total Marks: "<<tot;
cout<<"\n Grade: "<<grade;
cout<<"\n Thesis: ";
if(thesis) cout<<"Accepted";
else cout<<"Not Accepted";
}
};
void main(){
int ch;
while(1){
clrscr();
cout<<"\n UNIVERSITY";
cout<<"\n ~~~~~~~~~~";
cout<<"\n 1 -> Under Graduates.";
cout<<"\n 2 -> Post Graduates.";
cout<<"\n 3 -> Doctoral.";
cout<<"\n 4 -> Exit.";
cout<<"\n Enter your choice: ";
cin>>ch;
switch(ch){
case 1: // Under-Graduates.
Cunderg Oug;
Oug.getdata();
Oug.showdata();
break;
case 2: // Post-Graduates.
Cpostg Opg;
Opg.getdata();
Opg.showdata();
break;
case 3: // Doctoral.
Cdoctor Od;
Od.getdata();
Od.showdata();
break;
default:
exit(1);
} // end of switch.
getch();
} // end of while.
} // end of main.
Output:
UNIVERSITY
1 -> Under Graduates.
2 -> Post Graduates.
3 -> Doctoral.
4 -> Exit.
Enter your choice: 1
Enter Name: Nitin
Enter Marks in 5 Subjects: –
200
300
400
350
150
Name: Nitin
Total Marks: 1400
Grade: D
UNIVERSITY
1 -> Under Graduates.
2 -> Post Graduates.
3 -> Doctoral.
4 -> Exit.
Enter your choice: 2
Enter Name: Manoj
Enter Marks in 8 Subjects: –
200
300
250
350
150
400
200
100
Enter Marks of Seminar: 400
Name: Manoj
Total Marks in 8 Papers: 1950
Seminar Score: 400
Grade: D
C++ Program to implement Hierarchical Inheritance (Part 1) – Q20
Q20. Program to implement Hierarchical Inheritance (Part 1):
Imagine a publishing company that markets books as well as audicassette. Create a class publication that stores the title and price. From this class derive two classes as follows:
– Book, which adds a Pagecount, AuthurName, Edition
– Tape, which adds Playnigtime in minutes, SpeakerName, Date of Recording
Each of these classes should have a getdata( ) and putdat()
Functions to read and to display the data reapectively.
… from College notes (BCA/MCA assignments):
#include <iostream.h>
#include <conio.h>
class CPubs{
protected:
char title[20];
float price;
};
class CBooks : public CPubs{
private:
char aname[20];
int pcount, edition;
public:
void getdata(){
cout<<"\n Enter Title of Book: ";
cin>>title;
cout<<"\n Enter Price: ";
cin>>price;
cout<<"\n Enter Author Name: ";
cin>>aname;
cout<<"\n Enter Page Count: ";
cin>>pcount;
cout<<"\n Enter Edition: ";
cin>>edition;
}
void showdata(){
cout<<"\n\t Book Title: "<<title;
cout<<"\n\t Price: "<<price;
cout<<"\n\t Author Name: "<<aname;
cout<<"\n\t Page Count: "<<pcount;
cout<<"\n\t Edition no.: "<<edition;
}
};
class CTapes : public CPubs{
private:
char sname[20];
int ptime;
int dd, mm, yy;
public:
void getdata(){
cout<<"\n Enter Title of Cassette: ";
cin>>title;
cout<<"\n Enter Price: ";
cin>>price;
cout<<"\n Enter Speaker Name: ";
cin>>sname;
cout<<"\n Enter Play Time: ";
cin>>ptime;
cout<<"\n Enter Date of Recording (dd mm yy): ";
cin>>dd>>mm>>yy;
}
void showdata(){
cout<<"\n\t Cassette Title: "<<title;
cout<<"\n\t Price: "<<price;
cout<<"\n\t Speaker Name: "<<sname;
cout<<"\n\t Play Time: "<<ptime;
cout<<"\n\t Date of Recording: "
<<dd<<":"<<mm<<":"<<yy;
}
};
void main(){
CBooks Obook;
CTapes Otape;
clrscr();
cout<<"\n Publishing Company";
cout<<"\n ~~~~~~~~~~~~~~~~~~";
cout<<"\n Enter the Information of BOOKS:-"<<endl;
Obook.getdata();
cout<<"\n Enter the Information of TAPES:-"<<endl;
Otape.getdata();
clrscr();
cout<<"\n Information of BOOKS & TAPES : -";
cout<<"\n\n BOOKS : -"<<endl;
Obook.showdata();
cout<<"\n\n TAPES : -"<<endl;
Otape.showdata();
getch();
}
Output:
Publishing Company
Enter the Information of BOOKS:-
Enter Title of Book: cplusplus
Enter Price: 250
Enter Author Name: stroustrup
Enter Page Count: 700
Enter Edition: 4
Enter the Information of TAPES:-
Enter Title of Cassette: bacardiblast
Enter Price: 125
Enter Speaker Name: ricky
Enter Play Time: 90
Enter Date of Recording (dd mm yy): 10 03 2000
Information of BOOKS & TAPES : –
BOOKS : –
Book Title: cplusplus
Price: 250
Author Name: stroustrup
Page Count: 700
Edition no.: 4
TAPES : –
Cassette Title: bacardiblast
Price: 125
Speaker Name: ricky
Play Time: 90
Date of Recording: 10:3:2000
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