in library code #4433
Description
Prerequisites
- Write a descriptive title.
- Make sure you are able to repro it on the latest released version
- Search the existing issues, especially the pinned issues.
Exception report
1p.c++: In member function 'void member::displayRemember()':
1p.c++:70:27: error: 'Id' was not declared in this scope
cout<<"ID: "<<Id<<endl;
^~
1p.c++: In member function 'int member::getMemberId()':
1p.c++:76:16: error: 'Id' was not declared in this scope
return Id;
^~
1p.c++: In member function 'void library::borrowBook(int)':
1p.c++:117:30: error: 'b' was not declared in this scope
b.borowBook();
^
1p.c++: In function 'int main()':
1p.c++:157:15: error: invalid initialization of non-const reference of type 'Book&' from an rvalue of type 'Book'
l.addBook(Book(1, "C++", "Author1", 2000, true));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1p.c++:85:15: note: initializing argument 1 of 'void library::addBook(Book&)'
void addBook(Book& book)
^~~~~~~
1p.c++:158:15: error: invalid initialization of non-const reference of type 'Book&' from an rvalue of type 'Book'
l.addBook(Book(2, "Java", "Author2", 2010, true));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1p.c++:85:15: note: initializing argument 1 of 'void library::addBook(Book&)'
void addBook(Book& book)
^~~~~~~
1p.c++:159:45: error: 'Member' was not declared in this scope
l.addMember(Member(1, "John", "Address1"));
^
1p.c++:164:7: error: 'class library' has no member named 'borowBook'; did you mean 'borrowBook'?
l.borowBook(1, 1);
^~~~~~~~~
1p.c++:166:7: error: 'class library' has no member named 'borowBook'; did you mean 'borrowBook'?
l.borowBook(2, 2);
^~~~~~~~~
1p.c++:167:22: error: no matching function for call to 'library::returnBook(int, int)'
l.returnBook(1, 1);
^
1p.c++:136:18: note: candidate: void library::returnBook(int)
void returnBook( int bookId)
^~~~~~~~~~
1p.c++:136:18: note: candidate expects 1 argument, 2 provided
1p.c++:168:22: error: no matching function for call to 'library::returnBook(int, int)'
l.returnBook(2, 2);
^
1p.c++:136:18: note: candidate: void library::returnBook(int)
void returnBook( int bookId)
^~~~~~~~~~
1p.c++:136:18: note: candidate expects 1 argument, 2 provided
PS C:\Users\USER\Desktop\c++>Screenshot
ITS FIRST OP FOR ME AND I DONT KNOW WHAT PROBLEM HELP
Environment data
class Book
{
private:
int id;
string titel;
string author;
long year;
bool isAvailable ;
public:
Book(long i, string t, string a, long y, bool av)
{
id = i;
titel = t;
author = a;
year = y;
isAvailable = av;
}
void borowBook()
{
if (isAvailable = false)
{
cout<<"The book is borrowed"<<endl;
}
}
void returnBook()
{
if (isAvailable = true)
{
cout<<"The book is returned"<<endl;
}
}
bool getIsAvailable()
{
return isAvailable;
}
void display()
{
cout<<"ID: "<<id<<endl;
cout<<"Title: "<<titel<<endl;
cout<<"Author: "<<author<<endl;
cout<<"Year: "<<year<<endl;
cout<<"Availability: "<<(isAvailable?"Available":"Not Available")<<endl;
}
int getId()
{
return id;
}
};
class member
{
private:
int id;
string name;
string address;
public:
member(int i, string n, string a)
{
id = i;
name = n;
address = a;
}
void displayRemember()
{
cout<<"ID: "<<Id<<endl;
cout<<"Name: "<<name<<endl;
cout<<"Address: "<<address<<endl;
}
int getMemberId()
{
return Id;
}
};
class library
{
private:
vector<Book> books;
vector<member> members;
public:
void addBook(Book& book)
{
books.push_back(book);
}
void addMember(member& member)
{
members.push_back(member);
}
void displayAllBooks()
{
cout<<"All Books:"<<endl;
for(auto & book: books)
{
book.display();
}
}
void displayAllMembers()
{
cout<<"All Members:"<<endl;
for(auto & member: members)
{
member.displayRemember();
}
}
void borrowBook( int bookId)
{
for(auto &book : books)
{
if(book.getId() == bookId)
{
if(book.getIsAvailable())
{
b.borowBook();
cout<<"Book borrowed successfully"<<endl;
}
else
{
cout<<"Book is not available"<<endl;
return;
}
}
else
{
cout<<"Book not found \n "<<endl;
}
}
}
void returnBook( int bookId)
{
for(auto & book : books)
{
if(book.getId() == bookId)
{
book.returnBook();
cout<<"Book returned successfully"<<endl;
return;
}
}
cout<<"Book not found.....\n"<<endl;
}
};
int main()
{
library l;
l.addBook(Book(1, "C++", "Author1", 2000, true));
l.addBook(Book(2, "Java", "Author2", 2010, true));
l.addMember(Member(1, "John", "Address1"));
l.addMember(Member(2, "Jane", "Address2"));
cout<<"Library Management System"<<endl;
l.displayAllBooks();
l.displayAllMembers();
l.borowBook(1, 1);
cout<<"-------BOROWING A BOOK------------"<<endl;
l.borowBook(2, 2);
l.returnBook(1, 1);
l.returnBook(2, 2);
cout<<"-------RETURNED A BOOK------------"<<endl;
l.displayAllBooks();
l.displayAllMembers();
return 0;
}Steps to reproduce
library
Expected behavior
its first time to me so I don't expected
Actual behavior
did not understand it