How to implement a buffer-display widget just like "Application Output" widget in qt-creator?

[Limer]

I want to let all strings that sended by using printf(...) , display on a widget ( QLabel, QLineEdit,,,).

Just like the upper pic, the "Application Output" widget in qt-creator is what I want.

Could someone give me any advice?

[jsulm]

@Limer This should help: https://stackoverflow.com/questions/4810516/c-redirecting-stdout