Question

Create initializer/constructor functions for book. Declare and implement functions like insert book(insert at End, InsertAtFirst), retrieve book, update book information book using ISBN number in Library. Declare another function named Search to find a specific book from catalogue.

#include<iostream.h>
#include<conio.h>

struct book{
   char name[50];
   int ISBN;
   char authorname[50];
   char publishername[50];
   int issuedate;
   int issuemonth;
   int issueyear;
   int retdate;
   int retmonth;
   int retyear;
   struct book *next=NULL;
}

void insert(struct book *head){
    if *head.next==NULL{
       struct book node;
       cout<<"enter the name of book";
 
       gets(node.name)
       cout<<"enter the author name of book";
       gets(node.authorname)
       cout<<"enter the publisher name of book";
       gets(node.publishername)
       cout<<"enter isbn no.";
       cin>>node.ISBN;
       cout<<"enter the issue date month and year";
       cin>>node.issuedate;
       cin>>node.issuemonth;
       cin>>node.issueyear;
       cout<<"enter the return date month and year";
       cin>>node.retdate;
       cin>>node.retmonth;
       cin>>node.retyear;
       *head.next=&node;
    }
   else{
       insert(*head.next);
}
}
void main(){

//the pile of the books will be stored in a linked list where ISBN no. can be a searching key 
struct book library;//first book in library

insert(library);//inserting a book in library
insert(library);//inserting a book in library
getch();
}

Answer 1

Create initializer/constructor functions for book. Declare and implement functions like insert book(insert at End, InsertAtFirst),
retrieve book, update book information book using ISBN number in Library. Declare another function named Search to find a specific book from catalogue.

#include<iostream.h>
#include<conio.h>

struct book
{
    book()
    {
        int i=0;
    }
    char name[50];
    int ISBN;
    char authorname[50];
    char publishername[50];
    int issuedate;
    int issuemonth;
    int issueyear;
    int retdate;
    int retmonth;
    int retyear;
    struct book *next=NULL;
};
struct book *Library;
int count;
void InsertAtFirst (struct book B)
{
    struct book *node;
    if(count==0)
    {
        Library=(struct book *)(malloc(sizeof(struct book)));
        node=Library;
    }
    else
    {
        node=(struct book *)(malloc(sizeof(book)));
    }
    cout<<"enter the name of book";
    gets(node->name)
    cout<<"enter the author name of book";
    gets(node->authorname)
    cout<<"enter the publisher name of book";
    gets(node->publishername)
    cout<<"enter isbn no.";
    cin>>node->ISBN;
    cout<<"enter the issue date month and year";
    cin>>node->issuedate;
    cin>>node->issuemonth;
    cin>>node->issueyear;
    cout<<"enter the return date month and year";
    cin>>node->retdate;
    cin>>node->retmonth;
    cin>>node->retyear;
    if(count==0)
    {
        count+=1;
        Library->next=NULL;
    }
    else
    {
       node->next=Library;
       count+=1;
       Library=node;
    }
}
void InsertAtEnd(struct book B)
{
  
    struct book *node,*ptr;
    ptr=Library;
    while(ptr->next!=NULL)
    {
        ptr=ptr->next;
    }
    node=(struct book *)malloc(sizeof(struct book));
    cout<<"enter the name of book";
    gets(node->name);
    cout<<"enter the author name of book";
    gets(node->authorname);
    cout<<"enter the publisher name of book";
    gets(node->publishername);
    cout<<"enter isbn no.";
    cin>>node->ISBN;
    cout<<"enter the issue date month and year";
    cin>>node->issuedate;
    cin>>node->issuemonth;
    cin>>node->issueyear;
    cout<<"enter the return date month and year";
    cin>>node->retdate;
    cin>>node->retmonth;
    cin>>node->retyear;
    node->next=NULL;
    ptr->next=node;
    count+=1;
}
void searchbook(int num)
{
    struct book *ptr;
    ptr=Library;
    while(ptr!=NULL)
    {
        if(ptr->ISBN==num)
        {
            cout<<"Name "<<ptr-name<<endl;
            cout<<"Author name "<<ptr->authorname<<endl;
            cout<<"Issue date "<<ptr->issuedate<<"/"<<ptr->issuemonth<<"/"<<ptr->issueyear<<endl;
            cout<<"Rent date "<<ptr->retdate<<"/"<<ptr->retmonth<<"/"<<ptr->retyear<<endl;
            return ;  
        }
        ptr=ptr->next;
    }
    cout<<"Not found in Library"<<endl;
}
void retrievebook(int num)
{
    struct book *ptr;
    ptr=Library;
    while(ptr!=NULL)
    {
        if(ptr->ISBN==num)
        {
            cout<<"Name "<<ptr-name<<endl;
            cout<<"Author name "<<ptr->authorname<<endl;
            cout<<"Issue date "<<ptr->issuedate<<"/"<<ptr->issuemonth<<"/"<<ptr->issueyear<<endl;
            cout<<"Rent date "<<ptr->retdate<<"/"<<ptr->retmonth<<"/"<<ptr->retyear<<endl;
            return ;  
        }
        ptr=ptr->next;
    }
}
void updatebook(int num)
{
    struct book *ptr;
    ptr=Library;
    while(ptr!=NULL)
    {
        if(ptr->ISBN==num)
        {
            cout<<"Enter number to update info "<<endl;
            cout<<"Enter 1 for update book name '\n' 2 for update ISBN '\n' 3 for update author name '\n' 4 for updating issue date '\n' 5 for ret date"<<endl;
            switch(a)
            {
                case 1:
                        char str[50];
                        cout<<"Enter new book name"<<endl;
                        cin>>str;
                        ptr->name=str;
                case 2:
                        cout<<"enter new ISBN number"<<endl;
                        int isbn;
                        cin>>isbn;
                        ptr->ISBN=isbn;
                case 3:
                        char s[50];
                        cout<<"Enter new Author name"<<endl;
                        cin>>s;
                        ptr->authorname=s;
                case 4:
                        cout<<"enter new issue date"<<endl;
                        int a,b,c;
                        cin>>a;
                        cin>>b;
                        cin>>c;
                        ptr->issuedate=a;
                        ptr->issuemonth=b;
                        ptr->issueyear=c;
                case 5:
                        cout<<"enter new return date"<<endl;
                        int a,b,c;
                        cin>>a;
                        cin>>b;
                        cin>>c;
                        ptr->retdate=a;
                        ptr->retmonth=b;
                        ptr->retyear=c;
            }
            return;
        }
        ptr=ptr->next;
    }
}
void main()
{
    count=0;
    //the pile of the books will be stored in a linked list where ISBN no. can be a searching key
    struct book library;    //first book in library
    InsertAtFirst(library);   //inserting a book in library
    InsertAtEnd(library);        //inserting a book in library
    getch();
}