Qt代码段1

读取文件

QString readFile()
{
QFile f("filename.txt");
QString out;
if(!f.open(QIODevice::ReadOnly))
{
qDebug() << "Open failed.";
return out;
}
QTextStream txtInput(&f);
while(!txtInput.atEnd())
out.append(txtInput.readLine());
f.close();
return out;
}