Problem about argument of console app

[madawg]

I used QCommandLineParser to parse app's agrument

QCommandLineParser parser;
parser.parse(qApp->arguments());
const QStringList args = parser.positionalArguments();

QCommandLineParser parser;
parser.parse(qApp->arguments());
const QStringList args = parser.positionalArguments();

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input:
./app arg1 -a opt1 => args = arg1, opt1
./app arg -a opt1 arg1 => args = opt1, arg1

but I need: args only has the argument without the value of the option.