How to recover power outage data using C ++ programming in windows

Question

In my program, I write a file of my program states. I write a file many times to a file during program startup, because the program changes some variables that I need to store very often.

Now, if for some reason my power fails. Then most of the time I lose data in this file.

Please tell me some mechanism that can protect the data, even if there is a power failure. (I wrote a program in C ++ on Windows).

thank

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