// Pantea Aria

// Dynamically allocate a struct and return a pointer
// Complete the TODO sections below

// this program is not completed.

#include <stdio.h>
#include <stdlib.h>

struct book {
    int id;
    int pages;
};

// Function prototypes
struct book *create_book(int id, int pages);
void print_book(struct book *b);

int main(void) {

    // TODO 1:
    // Create a book with id 101 and 250 pages
    struct book *b1 = create_book(101, 250);

    // TODO 2:
    // Print the book details
    print_book(p);

    // TODO 3:
    // Create another book with id 202 and 300 pages
    struct book *b2 = NULL;   // your turn

    // TODO 4:
    // Print the second book

    // TODO 5:
    // Free both allocated books before program ends

    return 0;
}


// This function should:
// - Allocate memory for a struct book
// - Check if malloc returned NULL
// - Initialise the fields
// - Return the pointer
struct book *create_book(int id, int pages) {

    // TODO 6:
    // Allocate memory using malloc
    struct book *p = malloc(sizeof(struct book));


    // TODO 7:
    // Check if allocation failed
    // If NULL, print "Out of memory" and exit
    // you do this

    // TODO 8:
    // Set the struct fields using ->
    p->id = id;
    p->pages = pages;

    // TODO 9:
    // Return the pointer
    return p;

}


// This function should print book details
// Format: Book ID: __, Pages: __
void print_book(struct book *b) {

    // TODO 10:
    // Print the struct fields using ->
    printf("id is %d and pages is %d", b->id, b->pages);

}