void Widget::on_pushButton_clicked()
{
QFile file("file.txt");
if(!file.exists()){
ui ->textBrowser->append("file is not exists");
}
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)){
ui ->textBrowser->append("file is not open");
return ;
}
QTextStream in(&file);
while (!in.atEnd())
{
QString content = in.readLine();
ui->textBrowser->append(content);
}
}
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