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23 lines
342 B
C++
23 lines
342 B
C++
#ifndef BOOK_H_
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#define BOOK_H_
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#include <iosfwd>
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#include <string>
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struct Book {
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std::string id;
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std::string title;
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double price;
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std::string photo; // Name only
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bool IsNull() const {
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return id.empty();
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}
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};
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std::ostream& operator<<(std::ostream& os, const Book& book);
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extern const Book kNullBook;
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#endif // BOOK_H_
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