无法使用C ++中的构造函数初始化对象

Question

   #include <iostream>
using namespace std;

class Book
{
public:
Book(const string& ISBN,const string& title,const string& author,const string& cprDate,const bool& ch);
void checkBook(void);
void uncheckBook(void);
string ISBN(){return I;};
string title(){return t;};
string author(){return a;};
string cprDate(){return c;};
bool isChecked(){return check;};
private:
string I;   //ISBN
string t;   //title
string a;   //author
string c;   //copyright date
bool check; //is checked?
};

Book::Book(const string& ISBN,const string& title,const string& author,const string& cprDate,const bool& ch){
I=ISBN;
t=title;
a=author;
c=cprDate;
check=ch;
}

void Book::checkBook(void)
{
check=true;
}
void Book::uncheckBook(void)
{
check=false;
}
int main()
{
Book eragon{"ISBN:19851654-1851651-156115-156156","Eragonas","Paolini","2007",true};
//^This does not compile, it gives 2 errors: expected primary-expression before eragon
//and expected ';' before semicolon
return 0;
}

I'm doing exercise from book "Programming -- Principles and Practice Using C++" and i`m stuck at chapter 9 exercise 5 :

This exercise and the next few require you to design and implement a Book class, such as you can imagine as part of software for a library. Class Book should have members for the ISBN, title, author, and copyright date. Also store data on whether or not the book is checked out. Create functions for returning those data values. Create functions for checking a book in and out. Do simple validation of data entered into a Book; for example, accept ISBNs only of the form nn-nx where n is an integer and x is a digit or a letter. Store an ISBN as a string.

and i can`t even initialize Book object :/

Answer 1

Your compiler is not in C++11 mode. The {...} initializer syntax is new in C++11. Please see this question for enabling C++11 support in CodeBlocks .

The other option is to use C++03 syntax, but if this book is using C++11, you'll probably need to turn it on eventually. The C++03 syntax would be:

Book eragon("ISBN:19851654-1851651-156115-156156","Eragonas","Paolini","2007",true);

Answer 2

I dont known if your compiler is doing this for you, but, probably you need to include the string header

 #include <string>

and, as Dark Falcon said, change your book initialization, from {...} to (...), to compile in compiler pre c++11

Answer 3

In the int main(), you are initializing the constructor using the wrong set of brackets. Use () instead of {}.

Change it to-

Book eragon("ISBN:19851654-1851651-156115-156156","Eragonas","Paolini","2007",true);

Hope it solves your problem.

Answer 4

In classic C++, you would allocate a book on the heap using

    Book *eragon = new Book("ISBN: ..." And all your other parameters 

I'm on a tablet and can't copy all your arguments to show exactly