1. class Sample
{
public:
Sample();
void show() const;
void one(int);
int two(const string&);
private:
int first;
float second;
string third;
};
2. Sample::Sample()
{
first = 2;
second = -10.5;
}
void Sample::one(int val)
{
second = val + first;
}
int Sample::two(const string &newstr)
{
third = newstr;
if (second < 0)
return 1;
else
return 0;
}
void Sample::show() const
{
cout << "First is " << first << " Second is "
<< second << " Third is ";
third.print();
cout << endl;
}
3. class Other
{
public:
Other();
void othone(int,int);
void othtwo(const string&);
void print() const;
private:
string alpha;
Sample beta;
Sample gamma;
int delta;
};
4. Other::Other()
{
delta = -1;
}
void Other::othone(int num1, int num2)
{
beta.one(num1);
gamma.one(num2);
}
void Other::othtwo(const string& text)
{
alpha = text;
}
void Other::print() const
{
cout << "Alpha is ";
alpha.print();
cout << endl << "Beta is ";
beta.show();
cout << endl << "Gamma is ";
gamma.show();
cout << endl << "Delta is " << delta << endl;
}
5. Suppose the user enters mouse pad as the input to the program.
Then the output will be:
Not yet
Alpha is
Beta is First is 2 Second is -10.5 Third is
Gamma is First is 2 Second is -10.5 Third is
Delta is -1
Alpha is mouse pad
Beta is First is 2 Second is 7.0 Third is
Gamma is First is 2 Second is 8.0 Third is
Delta is -1
First is 2 Second is 10.0 Third is
6. class Book
{
public:
void setBook(const string&, const string&, float, int);
void print() const;
void update(char);
private:
string title;
string author;
float price;
int copies;
};
7. void Book::setBook(const string& auth, const string& ti,
float pr, int numcop)
{
author = auth;
title = ti;
price = pr;
copies = numcop;
}
void Book::print() const
{
cout << "The author is ";
author.print();
cout << "\nThe title is ";
title.print();
cout << "\nThe price is " << price;
cout << "\nThere are " << copies << " copies in stock\n\n";
}
void Book::update(char which)
{
if (which == ‘T’ || which == ‘t’)
{
cout << "Enter the new book title: ";
title.read();
}
if (which == ‘A’ || which == ‘a’)
{
cout << "Enter the new author: ";
author.read();
}
if (which == ‘P’ || which == ‘p’)
{
cout << "Enter the new price: ";
cin >> price;
}
if (which == ‘C’ || which == ‘c’)
{
cout << "Enter the new number of copies on hand: ";
cin >> copies;
}
}
8. const int MAXBOOKS = 100;
class BookStore
{
public:
BookStore();
int addBook(const Book&);
void printAll() const;
int update(const string&);
private:
Book books[MAXBOOKS];
int numOfBooks;
};
9. BookStore::BookStore()
{
numOfBooks = 0;
}
int BookStore::addBook(const Book& newbook)
{
int ok = 0;
if (numOfBooks < MAXBOOKS)
{
ok = 1;
books[numOfBooks] = newbook;
numOfBooks++;
}
return ok;
}
void BookStore::printAll() const
{
cout << "The books in the bookstore are:\n";
for (int i = 0 ; i < numOfBooks ; i++)
books[i].print();
}
The update function cannot be written for the BookStore class
because there is no way for a BookStore member function to
check the title of a book.
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