Explanation: In the above program, out is an object of the ofstream class. The object
outis used with the open()function to open files for the write operation. Two files are
opened: months and days. Month names are written in the file months, and number of days
is written in the file days. The data are written in the files one after another. The same object
is used for both the files; hence, it is necessary to close a previously linked file with the object
before opening a new file. In this program, the month file is opened first and after closing it,
the file day
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