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Which header file is required to use file I/O operations?

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Which header file is required to use file I/O operations?

(a) <ifstream>

(b) <ostream>

(c) <fstream>

(d) <iostream>

I had been asked this question by my college director while I was bunking the class.

My doubt is from File Handling in division Strings, Streams & Numerics in C++ of C++

1 Answer

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Best answer
Right choice is (c) <fstream>

Best explanation: <fstream> header file is needed to use file I/O operations in C++. This header file contains all the file I/O operations definition.

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