Member Avatar for funjoke88

1. Write a C program to read a list of books from a file and create a linked list to store them. The purpose of this program is to keep track of the books kept in a shelf. The shelf is a three-tier shelf and each tier can store up to 4500 pages maximum. The books are kept in alphabetical order (ascending).

i have the answer in c++ code can anyone help me change back to c code .thanks

#include<conio.h>
#include<iostream.h>
#include<string.h>
#include<stdlib.h>
#include<stdio.h>
#include<assert.h>

class nodeBook
{
   public:
   char bookName[20];
   char isbn[20];
   double pages;
   nodeBook* next;
};

class List
{
	public:
   List(void) { head=NULL; }
   ~List(void);

   bool IsEmpty() { return head==NULL; }
   void InsertNode(char[], char[],double);
   int FindNode(char x[]);
   int DeleteNode(char x[]);
   void DisplayList(void);
   int totalPages(void);

   private:
   nodeBook* head;
};

List::~List(void)
{
	nodeBook* currNode = head, *nextNode;
   while (currNode != NULL)
   {
   nextNode = currNode->next;
   delete currNode;
   currNode = nextNode;
   }
}

void List::InsertNode(char x[], char y[], double z)
{
	nodeBook *n= new nodeBook;
   strcpy(n->bookName, x);
   strcpy(n->isbn, y);
   n->pages = z;
	nodeBook* prevNode = NULL;
   nodeBook* currNode = head;

   while((currNode!=NULL) && strcmp(x, currNode->bookName)>0)
   {
   	prevNode=currNode;
      currNode=currNode->next;
   }

   if (head==NULL)
   {
   cout<<"\nThe name of the book:" << x << " is add into empty shelf.";
   n->next=NULL;
   head=n;
   }

   else if ((prevNode == NULL)&& (head!=NULL))
   {
   cout<<"\nThe name of the book:" << x << " is add to the front shelf.";
   n->next = currNode;
   head=n;
   }

   else
   {
   cout <<"\nThe name of the book: " << x <<" is add to the middle or last in the shelf.";
   n->next = currNode;
   prevNode->next=n;
   }
}

int List::FindNode(char book[])
{
	nodeBook* currNode = head;
   int currIndex = 1;
   double pg = 0;

   while (currNode && strcmp(currNode->bookName, book)!=0)
   {
   	pg = pg + currNode->pages;
   	currNode = currNode->next;
      currIndex++;
   }
   pg = pg + currNode->pages;
   if(pg <= 4500)
   cout << "The book is found in the 1st tier.";
   else if(pg <= 9000)
   cout << "The book is found in the 2nd tier.";
   else if(pg <= 13500)
   cout << "The book is found in the 3rd tier.";
   if (currNode)
   return currIndex;
   return 0;
}

int List::DeleteNode(char book[])
{
	nodeBook* prevNode=NULL;
   nodeBook* currNode = head;
   int currIndex=1;

   while (currNode && strcmp(currNode->bookName, book)!=0)
   {
   	prevNode=currNode;
      currNode=currNode->next;
      currIndex++;
   }
   if(currNode)
   {
      if(prevNode)
      {prevNode->next=currNode->next;
      delete currNode;
   	}
    	else
    	{
    	head=currNode->next;
      delete currNode;
    	}
    	return currIndex;
    }
    else
    cout << "\nSorry, the book is not in the tier and cannot be deleted.\n";
    return 0;
}

void List::DisplayList()
{
	int number = 0;
   nodeBook* currNode = head;
   while (currNode !=NULL)
   {
   cout << currNode->bookName << "\t" << currNode->isbn << "\t" <<currNode->pages << "\n" << endl;
   currNode = currNode->next;
   number++;
   }
   cout<< "Number of book is:" << number << endl;
}

int List::totalPages()
{
	double total = 0;
   nodeBook* currNode = head;
   while (currNode !=NULL)
   {
   total = total + currNode->pages;
   currNode = currNode->next;
   }
   return total;
}

int main(void)
{
	List list;
   char isbn[30];
   char bookName[30];
   double pages;

   cout << "Link List";
   cout << "\n\nPlease insert book information into the tier.";
   /*for(int i=1; i<=4500;i++)
   {
   cout << "\nPlease insert the name of the book:";
   cin >> bookName;
   cout << "\nPlease insert the ISBN of the book:";
   cin >> isbn;
   cout << "\n Please insert the number of pages the book have:";
   cin >> pages;
   cout << "\nThe book is inserted into the first tier.";

   list.InsertNode(bookName, isbn, pages);
   cout<<"\n\nThe content of the tier:\n";
   list.DisplayList();
   }*/
   int s;
   do
   {
   cout << "\n\nSelect 1 to add book information into the tier.\nSelect 2 to search whether the book exist in the tier.\nSelect 3 to delete the information from the tier.\nSelect 0 to exit.";
   cin >> s;

   if(s==1)
   {
   cout << "\nPlease insert the name of the book:";
   cin >> bookName;
   cout << "\nPlease insert the ISBN of the book:";
   cin >> isbn;
   cout << "\nPlease insert the pages of the book:";
   cin >> pages;

   list.InsertNode(bookName, isbn, pages);
   cout<<"\n\nThe content of the tier:\n";
   list.DisplayList();
   int p = list.totalPages();
   if(p > 10125)
   cout << "WARNING! The shelf is 75% full.";

   }

   else if(s==2)
   {
   char find[20];
   cout << "\nPlease enter the name of the book that you wish to search for:";
   cin >> find;
   int f = list.FindNode(find);
   if (f==0)
   cout << "\nSorry, the book is not found in the shelf.\n\n";
   else
   cout << "\nThe book is found in the shelf.\n\n";
   }

   else if(s==3)
   {
   char del[20];
   cout << "\nPlease enter the name of the book that you wish to delete:";
   cin >> del;
   int d = list.DeleteNode(del);
   if (d!=0)
   cout << "\nThe book information is deleted from the list.\n";
   }

   else if(s==0)
   {
   getch();
   }

   else
   cout << "Sorry, invalid selection.";
   }while(s!=0);
   getch();
   return 0;

}
  • 3 Contributors
  • 2 Replies
  • 146 Views
  • 3 Days Discussion Span
  • Latest Post Latest Post by chili5
chili5 commented: You found some really bad code, and don't be so lazy. Geez, asking people to do your work does not help you at all. +0

Recommended Answers

All 2 Replies

Member Avatar for Nick Evan

i have the answer in c++ code can anyone help me change back to c code .thanks

So you found some code on the interwebs but, too bad for you, it's in the wrong language. And now your asking us to write the code for you? That's not how it works.

If you're interested in how linked lists actually work, and perhaps (heaven forbid) even want to learn how to make them yourself, then click here

Member Avatar for chili5

You aren't going to get anything on any web site as a solution to this.

If you understand some about C++ then converting this to C will be easy. Don't be lazy.

Anyways, this code you found isn't the greatest code anyways. It doesn't account for a book title of more than one word. Great, you managed to find some code online but it is bad code.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.