Immediately processing char instead of waiting for return key

Question

I want to accept several characters in my input and process them as they are being typed. I would use it like that:

char c;
string line;
    
while((c = getchar() != '.')) 
    line += c;   

cout << line << endl;

The expected behavior would be to stop getting inputs as soon as a '.' char is typed, without the need for the return button to be pressed.

How are you running your program? It might not be C++ that is waiting for the newline, but the shell instead — Caleth, Nov 04 '22 at 11:48

Lefeuvre Aristide · Answer 1 · 2022-11-04T13:52:21.473

0

The solution could be to use the ncurses library which allows you to open a graphic window of a terminal and to have getch() type functions but which does not block your program if you allow it before (Stack exemple here). Then it is possible to constantly check if a '.' was pressed and performed N actions at the same time. I hope I was able to help you !

edited Nov 04 '22 at 13:52

answered Nov 04 '22 at 13:50

Lefeuvre Aristide

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Immediately processing char instead of waiting for return key

1 Answers1