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Pick out the wrong header file about strings.

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Pick out the wrong header file about strings.

(a) <string>

(b) <regex>

(c) <ios>

(d) <reg>

I had been asked this question in an interview for internship.

Query is from Standard Library Design topic in portion Class Hierarchies, Library & Containers of C++

1 Answer

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Right option is (c) <ios>

For explanation: The standard header files for string is string and regex. So the wrong one presented here is ios.

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