Why Are the Extraction and Insertion Operators Always Implemented as Friends

question 11

Multiple Choice

Why are the extraction and insertion operators always implemented as friends of the class rather than as members of the class?

• A) Because the first parameter must be the stream object.
• B) They don't, they could be members
• C) Because they return a reference
• D) Because the stream is passed by reference.

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Definitions:

Marginal Cost

The increase in cost that results from producing one additional unit of a good or service.

Efficiency Loss

The loss of potential economic welfare when resources are not optimally allocated, leading to outcomes where potential benefits exceed costs.

Sacrificed Output

The quantity of goods or services forgone in the production of another good or service, highlighting the concept of opportunity cost.

Tax Revenue

The financial earnings governments receive through taxing.