Creating/saving text files

How can I create txt file in a desired of me directory using C++?

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well, i got this code:

but im curious where this text.txt file is saved

It is saved in the current working direction where the program is executed (the directory of the program in many / most cases). But you can also pass an absolute path like that:
In that case the file is always located as C:\test.txt regardless of where the program is executed.
With best regards
Jeoni

even like that, no text.txt file i can find in my C: disk