Imagine a publishing company which does marketing for book and audio cassette versions. Create a class publication that stores the title (a string) and price (type float) of publications. From this class derive two classes: book which adds a page count (type int) and tape which adds a playing time in minutes (type float). Write a program that instantiates the book and tape class, allows user to enter data and displays the data members. If an exception is caught, replace all the data member values with zero values
Object Oriented Programming Assignment 3
Imagine a publishing company which does marketing for book and audio cassette versions. Create a class publication that stores the title (a string) and price (type float) of publications. From this class derive two classes: book which adds a page count (type int) and tape which adds a playing time in minutes (type float).
Write a program that instantiates the book and tape class, allows user to enter data and displays the data members. If an exception is caught, replace all the data member values with zero values
Code :
#include<iostream>
#program by Narendra Dwivedi Intel 20U520
#include<string>
using namespace std;
//base class publication
class publication
{
private:
string title;
float prices;
public:
publication()
{
title="";
prices=0.0;
}
void get_data()
{
cout<<"\nEnter Title :";
cin.ignore();//clear input buffer
getline(cin,title);
cout<<"\nEnter Price : ";
cin>>prices;
}
void put_data()
{
cout<<"\n ________________________________ \n";
cout<<"\n Information : " <<endl;
cout<<"\n Title :"<<title;
cout<<"\n Price :"<<prices;
}
};
class book: public publication
{
private:
int pages;
public:
book(){
pages=0;
}
void get_data()
{
publication::get_data();
cout<<endl;
cout<<"Enter Page Count : \n";
cin>>pages;
}
void put_data()
{
publication::put_data();
try{
if(pages<0)
throw pages;}
catch(int f)
{
cout<<"\n error: pages not valid :"<<f;
pages=0;
}
cout<<"\n Pages Are :"<<pages;
}
};
class tape: public publication
{
private:
float playtime;
public:
tape()
{
playtime=0.0;
}
void get_data()
{
publication::get_data();
cout<<"Enter Play Time Of Cassette \n";
cin>>playtime;
}
void put_data()
{
publication::put_data();
try
{
if(playtime<0.0)
throw playtime;
}
catch(float r)
{
cout<<"\n Error: Invalid Playtime : "<<playtime;
playtime=0.0;
}
cout<<"\n Playtime is : "<<playtime;
}
};
int main()//main program
{
book b[10];// arrray of objects
tape t[10];
int choice=0,bookCount=0,tapeCount=0;
cout<<"-----------------------";
do
{
cout<<"\n 1. Add book ";
cout<<"\n 2. Add tape: ";
cout<<"\n 3. Display book ";
cout<<"\n 4. Display tape";
cout<<"\n 5. Exit:"<<endl;
cout<<"\n Enter Choice : ";
cin>>choice;
switch(choice)
{
case 1:
{
cout<<"\n--------------\n";
cout<<"Add Book: \n";
b[bookCount].get_data();
bookCount++;
break;
}
case 2:
{
cout<<"\n--------------\n";
cout<<"Add Tape: \n";
t[tapeCount].get_data();
tapeCount++;
break;
}
case 3:
{
cout<<"\n (books)";
for(int j=0;j<bookCount;j++)
{
b[j].put_data();
}
break;
}
case 4:
{
cout<<"\n (tape)";
for(int j=0;j<tapeCount;j++)
{
t[j].put_data();
}
break;
}
case 5:
{
cout<<"**********Program Exited
Successfully**********"<<endl;
exit(0);
}
default:
{
cout<<"\n Invalid";
}
}
}
while(choice!=5);
return 0;
}
Output :
Post a Comment