problem with using classes.

[ACLerok]

alright. i keep getting this message:
library.h: In member function `void Book::AddBook()':
library.h:36: error: no match for 'operator>>' in 'std::cin >>
temp->Book::bookID'

here is my library.h

#include 
using std::cout;
using std::cin;
using std::endl;
class Book
{
public:
char bookName[40];
int bookID[10];
int numCopies;
Book *next;
Book(int=0);
void AddBook();
};
Book *current;
Book *start_ptr = NULL;
Book::Book(int copies) : numCopies(copies){}
void Book::AddBook() //add book to end of list
{
Book *temp, *temp2;
temp = new Book;
cout << "\nEnter title of book: ";
cin >> temp->bookName;
cout << "\nEnter ID: ";
cin >> temp->bookID;
cout << "\nEnter number of copies: ";
cin >> temp->numCopies;
temp->next = NULL;
if(start_ptr == NULL) //if list is empty
{
start_ptr = temp;
current = start_ptr;
}
else
{
temp2 = start_ptr;
while(temp2->next != NULL)
temp2 = temp2->next;
temp2->next = temp;
}
}

it is supposed to add a Book to the end of the link list.

[ACLerok]

Originally Posted by ACLerok alright. i keep getting this message: library.h: In member function `void Book::AddBook()': library.h:36: error: no match for 'operator>>' in 'std::cin >> temp->Book::bookID' here is my library.h #include using std::cout; using std::cin; using std::endl; class Book { public: char bookName[40]; int bookID[10]; int numCopies; Book *next; Book(int=0); void AddBook(); }; Book *current; Book *start_ptr = NULL; Book::Book(int copies) : numCopies(copies){} void Book::AddBook() //add book to end of list { Book *temp, *temp2; temp = new Book; cout << "\nEnter title of book: "; cin >> temp->bookName; cout << "\nEnter ID: "; cin >> temp->bookID; cout << "\nEnter number of copies: "; cin >> temp->numCopies; temp->next = NULL; if(start_ptr == NULL) //if list is empty { start_ptr = temp; current = start_ptr; } else { temp2 = start_ptr; while(temp2->next != NULL) temp2 = temp2->next; temp2->next = temp; } } it is supposed to add a Book to the end of the link list.

anyone?

[cuog]

What language are u using and could u attatch the files or email them to me at fst79ta@gmail.com and i can try and help you if that is c/c++/c#

[alfie2]

I think it is Java or C++

anyway,

the probelm here is you( ACLerok ) delcared an array of integer in BOOKID:

|||||||||||||||||||||||||||||||||||||||||||
class Book
{
public:
char bookName[40];
int bookID[10];<-----------------This is an array of 10 integers!!!
int numCopies;
Book *next;
Book(int=0);
void AddBook();
};

|||||||||||||||||||||||||||||||||||

If you want integer with 10 digits you should have used

long bookID;

if your BOOKID have characters in it:

char bookID[10];

got it?

[cuog]

its C++ and it appears to me that the arrays were declared wrong o ill have to get a look at that, its easy to tell it isnt java because the extension for java are .java/.jar/.class and a few others i think but ill get to playing with the code and trying to solve it as soon as i can

[alfie2]

=====================
class Book
{
public:
char bookName[40];
int bookID[10];
int numCopies;
Book *next;
Book(int=0);
void AddBook();
};
====================

my point is this:

if one declare:

int bookID[10];

then one can NOT do the following:

cout << "\nEnter ID: ";
cin >> temp->bookID; <-----trying to insert a number into a pointer
is an illegal operation!

The following statements are of correct syntax:

cout << "\nEnter ID: ";
cin >> temp->bookID[0];<---first element in array "bookID"


or
cin >> temp->bookID[1];<---second element in array "bookID"
or
:
:
cin >> temp->bookID[9];<---tenth and last element in array "bookID"

------------
if one try to read a large 10-digit # like 9876543210
then one declares a "LONG" integer or use a "CHAR" array.
since the largest signed 32-bit integer is 2147483647
and unsigned is 4294967295

a LONG integer is infinte( well, whatever the system memory can hold anyway)

////////////////////////////////////
or you can delcare:

char bookID[10];

then the following is totally LEGAL and program compiles/runs fine:

cout << "\nEnter ID: ";
cin >> temp->bookID;
/////////////////////////////////////

[cuog]

yeah i see it was an indexer mmistake it appears these arrays are a little wierd to me since I just switched over to C languages from java but its prety cool I hope u keep at it and have a lot of fun programming