'string does not name a type'

[TheDomesticUser2]

Hello. Whenever I declare a string in a class it compiles an error stating 'string does not name a type' please help

#ifndef LIBRARY
#define LIBRARY

class book {
private:
string author;
string title;
int publicationYear;
public:
string returnAuthor(){return author;}
string returnTitle(){return title;}
int returnPublicationYear(){return publicationYear;}
};

class library {
};

#endif

[jlb]

You need to both #include the proper header file for the std::string class and properly scope that standard class.

[TheDomesticUser2]

What is the proper header file?

[jlb]

Did you even try to research this simple topic? "C++ string"

[E0p9LyTq]

What is the proper header file?

You can start here:

https://www.learncpp.com/cpp-tutorial/4-4b-an-introduction-to-stdstring/

and here

http://www.cplusplus.com/reference/string/

[Handy Andy]

Hello TheDomesticUser2,

Just because your error appears to be in the class which looks like a header file does not mean that is where the error started.

You are missing the code that has "main" in it.

This is a case where all the code is needed.

Andy