p03Books01
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//p03books01
//author
//date 07/05/2001


//include files
#include <iostream.h>
#include <string.h>


//constants
const int TITLE_LEN = 20;
const int AUTHOR_LEN = 20;


//BookType struct definition
struct BookType
  {
  char title[TITLE_LEN+1];
  char author[AUTHOR_LEN+1];
  int year;
  };


void display(BookType b);
void initialize(BookType &b, char t[], char a[], int y);
void input(BookType &b);
void copy(BookType &b1, BookType b2);
void display(BookType books[], int n);
void displayRev(BookType books[], int n);
void sortBubble(BookType books[], int n);


//main function
void main(void)
  {
  BookType b1, b2;
  initialize(b1, "C++ The Hard Way", "Fowler", 2002);
  display(b1);
  copy(b2, b1);
  display(b2);

  BookType books[10];
  initialize(books[0], "title0", "author0", 0);
  initialize(books[1], "title1", "author1", 1);
  initialize(books[2], "title2", "author2", 2);
  initialize(books[3], "title3", "author3", 3);
  display(books, 4);
  displayRev(books, 4);
  }


//function to display the contents of BookType variable
void display(BookType b)
  {
  cout << "Title:  " << b.title << endl;
  cout << "Author: " << b.author << endl;
  cout << "Year:   " << b.year << endl;
  }


//function to display the contents of BookType array
void display(BookType books[], int n)
  {
  for (int i=0; i<=n-1; i++)
    display(books[i]);
    /*
    {
    cout << "Title:  " << books[i].title << endl;
    cout << "Author: " << books[i].author << endl;
    cout << "Year:   " << books[i].year << endl;
    }
    */
  }


//function to display the contents of BookType array
void displayRev(BookType books[], int n)
  {
  for (int i=n-1; i>=0; i--)
    display(books[i]);
  }


//function to initialize the contents of BookType variable
void initialize(BookType &b, char t[], char a[], int y)
  {
  strcpy(b.title, t);
  strcpy(b.author, a);
  b.year = y;
  }


//function to input the contents of BookType variable
void input(BookType &b)
  {
  cout << "Title:  "; cin >> b.title;
  cout << "Author: "; cin >> b.author;
  cout << "Year:   "; cin >> b.year;
  }


//function to copy b2 to b1
void copy(BookType &b1, BookType b2)
  {
  strcpy(b1.author, b2.author);
  strcpy(b1.title, b2.title);
  b1.year = b2.year;
  }


//function to sort array books by title
void sortBubble(BookType books[], int n)
/*
do the following
  sorted = true
  complete a pass (set sorted = false if swap took place)
  until sorted


do the following
  sorted = true
  for i=0 to n-2 do the following
    if books[i] > books[i+1] then
      swap books[i], books[i+1]
      sorted = false
      end if
    end for
  until sorted

*/