// Copyright (C) 2016 The Qt Company Ltd.// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0#include <stdio.h>intmain(){int c;for(;;) {
c =fgetc(stdin);if(c =='\0')break;if(c != -1) {fputc(c, stdout);fputc(c, stderr);fflush(stdout);fflush(stderr);}}return0;}