// This is my solution to Assignment 4 using arrays- Kent
#include <stdio.h>
#include <stream.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

struct book {
    char *title;
    int pages;
    float cost;
}; // book

const int MAXBOOKS=30;
struct book Books[MAXBOOKS];  // array of book structures

// function headers
float cost_count(int);
int page_count(int);
void print_books(int);

int 
main(int argc, char **argv)
{
    int actual_count = 0;
    char yn='y';
    char buffer[1024];    // buffer for title input

    while(actual_count < MAXBOOKS) {
       // get the data from the user
       cout << "Please enter the book title: ";
       cin >> buffer;
       if( (Books[actual_count].title = new char [strlen(buffer)+1]) == NULL) {
          // there was no space available
          cout << "Not enough memory for the book title" << endl;
          exit(1);
       }
       (void) strcpy(Books[actual_count].title,buffer);

       cout << "Please enter the number of pages: ";
       cin >> Books[actual_count].pages;

       cout << "Please enter the cost: ";
       cin >> Books[actual_count].cost;
       actual_count++;

       cout << "do you want to enter another? (y/n) ";
       cin >> yn;
       if( (tolower(yn) != 'y'))  // tolower() changes its arg to lowercase
         break;
    } // while

    print_books(actual_count);

    cout << "--------------------------" << endl;
    cout << "Total books: " << actual_count << endl;
    cout << "Total pages: " << page_count(actual_count)  << endl;
    cout << "Total cost: "  << cost_count(actual_count)   << endl;

    return 0;
} // main

/* go over the array of book structures
   printing the contents of each one
*/
void
print_books(int count)
{
   for(int i = 0; i < count; i++) {
      cout << "book number: " << i << endl;
      cout << "title: " << Books[i].title << endl;
      cout << "pages: " << Books[i].pages << endl;
      cout << "cost: "  << Books[i].cost  << endl;
      cout << endl;
   } // for
} // print_books

// Add up the total count of pages
int
page_count(int count)
{
    int total_pages = 0;

    for(int i = 0; i < count; i++ )
       total_pages += Books[i].pages;
    return(total_pages);
} // page_count

// Add up the total cost of all books
float
cost_count(int count)
{
    float total_cost = 0.0;

    for(int i = 0; i < count; i++ )
       total_cost += Books[i].cost;
    return(total_cost);
} // page_count