Question

How to use unitbuf format flag to forcing flush to file after every insertion in C++

Answer 1

#include <iostream>
#include <fstream>

using std::cout;
using std::endl;

int main()
{
	std::ofstream file("d:\\test.txt");

	file << std::unitbuf << "C++ " << "Programming" << '\n'; // flush 3 times

	file.close();

	return 0;
}


/*
run:

test.txt:
---------
C++ Programming

*/

 

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