d8/dc4/src__corelib__io__qfile_8cpp_source.html

// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause


QFile file;

QDir::setCurrent("/tmp");

file.setFileName("readme.txt");

QDir::setCurrent("/home");

file.open(QIODevice::ReadOnly);      // opens "/home/readme.txt" under Unix


#include <stdio.h>


void printError(const char* msg)

{

    QFile file;

    file.open(stderr, QIODevice::WriteOnly);

    file.write(msg, qstrlen(msg));        // write to stderr

    file.close();

}


CONFIG += console

QDir::setCurrent
static bool setCurrent(const QString &path)
Sets the application's current working directory to path.
Definition qdir.cpp:2030

QFileDevice::close
void close() override
Calls QFileDevice::flush() and closes the file.
Definition qfiledevice.cpp:326

QFile
\inmodule QtCore
Definition qfile.h:93

QFile::open
QFILE_MAYBE_NODISCARD bool open(OpenMode flags) override
Opens the file using OpenMode mode, returning true if successful; otherwise false.
Definition qfile.cpp:904

QFile::setFileName
void setFileName(const QString &name)
Sets the name of the file.
Definition qfile.cpp:302

QIODeviceBase::ReadOnly
@ ReadOnly
Definition qiodevicebase.h:18

QIODeviceBase::WriteOnly
@ WriteOnly
Definition qiodevicebase.h:19

QIODevice::write
qint64 write(const char *data, qint64 len)
Writes at most maxSize bytes of data from data to the device.
Definition qiodevice.cpp:1639

CONFIG
CONFIG
[20]
Definition doc_src_containers.cpp:232

qstrlen
size_t qstrlen(const char *str)
Definition qbytearrayalgorithms.h:104

file
QFile file
[0]
Definition src_corelib_io_qfile.cpp:5

printError
void printError(const char *msg)
[0]
Definition src_corelib_io_qfile.cpp:16