Hard Disk

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Dipu's hard disk crashed last week. He bought a new one and has already installed all necessary software. But he has lost his personal collection of media files. It is just unbearable! How can he avoid such a loss in future? Dipu is planning to maintain a "fresh" second hard disk in his computer as a backup device. He wants to make sure that the backup hard disk is never too old, by replacing it

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solution.cppC++17

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