error question

[Kbott]

I can not find any relevant information on the error I am getting.

Library.cpp:25:33: error: conversion from ‘Book*’ to non-scalar type ‘Book’ requested
       Book btemp = holdings.at(i);

Book is a class in another file
Holdings is a vector.
I want to make a temp holding location for the information at location i

string Library::checkOutBook(string pID, string bID)
{
   for(int i = 0; i < holdings.size(); i++)
   {
      Book btemp = holdings.at(i); 
      if(bID != btemp.getIdCode())  
}
}  

not sure what the error is about.

I read over this
http://www.cplusplus.com/forum/beginner/25109/
and it did not lead to a solution.

[Kbott]

I guess the real question boils down to how to I make a temp object so I can run some checks?

[Computergeek01]

What data type is "Holdings" a vector of?

[Kbott]

it is
vector <Book*> holdings;

[E0p9LyTq]

vector <Book*> holdings;

A vector containing pointers to books.

[AbstractionAnon]

holdings is a vectors of pointers. holdings.at() is going to return a reference to a pointer to a Book. Line 5, you can't assign a pointer to a Book to a Book.

You can fix that in one of two ways.

  //  1.  Make btemp a pointer.
  Book * btemp = holdings.at(i);  //  Assign a pointer
  //  2.  Dereference the pointer returned by at()
  Book btemp = *holdings.at(i);

[Kbott]

number 1 worked just wondering why I need to Dereference the pointer returned by at().

[E0p9LyTq]

holdings.at(i) returns a pointer. You either store that pointer in another pointer, or deference to type (Book).

[Kbott]

aaaa ok cool thank you both.