On Thu, Aug 27, 2026 at 11:56:51AM +0000, Jean-Christophe wrote: > On Thu, 2026-08-27 at 07:22 +0200, [email protected] wrote: > > On Wed, Aug 26, 2026 at 07:15:00PM +0000, Jean-Christophe wrote: > > > hello, > > > > > > i try to write an my_files.txt > > > > > > and see the output on tty > > > > As Dan Ritter said in this thread: you are calling fonction_deux: > > > > > bool fonction_deux (){ > > > fstream my_file; > > > my_file.open("my_file.txt", ios::out); > > > if (!my_file) { > > > cout << "File not created!"; > > > > ...and here, you are writing to stdout (what you call "tt", I > > think) > > > > > } > > > else { > > > cout << "File created successfully!\n" << endl; > > > cout << fonction_un() << endl; > > > > > > my_file.close(); > > > } > > > var_fonction_deux = true; > > > return var_fonction_deux; > > > } > > > > and in all the other places too ("cout" writes to stdout). > > If you want to write to your fstream my_file, which is > > connected to "my_file.txt") you have to do something like > > > > my_file << "some text going to file" << endl; > > > > (See https://www.w3schools.com/cpp/ref_fstream_fstream.asp for a more > > complete example). > > bool fonction_deux (){ > fstream MyFile("my_file.txt"); > if (!MyFile) { > cout << "File not created!"; > } > else { > cout << "File created successfully!\n" << endl; > MyFile << fonction_un(); > > MyFile.close(); > } > var_fonction_deux = true; > return var_fonction_deux; > } > > I was inspired by the code, but I have the following compilation error: > > $ g++ -std=c++23 test-fonction.cpp test-fonction.out
Try: g++ -std=c++23 test-fonction.cpp -o test-fonction (note the "-o" option and leaving out the ".out" suffix: by convention binaries have no suffix, and the C++ compiler possibly tries to do something different when seeing one, I don't know). One more thing: what do you expect this line to do? > MyFile << fonction_un(); Cheers -- t
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