Issue with C++ console output -

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#include <iostream>                                                               using namespace std;  int main() {    cout << 1;    while (true);    return 0; }

i thought program should print 1 , hung. doesn't print anything, hungs. cout << endl or cout.flush() can solve problem, still want know why it's not working expected :) problem appeared during codeforces contest , spent lot of time on looking @ strange behavior of program. incorrect, hunged, hidden output debug information.

i tried using printf (compiling gcc) , behaves cout, question can referred c also.

you writing buffer. need flush buffer. @guvante mentioned, use cout.flush() or fflush(stdout) printf.

update:

looks fflush works cout. don't - may not fact in cases.


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