Why does read define its Sales_data parameter as a plain reference and print define its parameter as a reference to const
belongs to book: C++ Primer|Stanley B.Lippman, Josee Lajoie, Barbara E.Moo|5th Edition| Chapter number:7| Question number:8
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C++ programming
The
`read`function will change its`Sales_data`parameter and pass the information back via plain reference.The
`print`function won't change its`Sales_data`parameter, and by using a reference to `const`, we can print`const Sales_data`object as well.
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