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Which operator is used to create the user-defined streams in c++?

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Which operator is used to create the user-defined streams in c++?

(a) >>

(b) <<

(c) &

(d) Both >> & <<

This question was posed to me during an online exam.

I need to ask this question from Class Hierarchies Introduction in chapter Class Hierarchies, Library & Containers of C++

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Correct option is (d) Both >> & <<

Explanation: We can make user-defined types with streams by overloading the insertion operator (<<) to put objects into streams and the extraction operator (>>) to read objects from streams.

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