How to save double value as 0.0 instead of 0 from QJsonDocument to a file

[niks_entire]

Hi,

I have a QJsonDocument containing some QJsonObjects - ints, doubles, and strings. The problem that I'm facing is when I try to save a double value as 0.0, it always get saved as 0 in the file and there is no decimal. It is some weird requirement to have but this is what I want to acheive basically.

QJsonDocument jsonDoc;
QJsonObject jsonObj;
jsonObj["radius"] = 0.0;
jsonDoc.setObject(jsonObj);

QSaveFile file;
file.setFileName(QString::fromStdString(fileName));
if (!file.open(QIODevice::WriteOnly)) {
    return ERR_FAILURE;
}

file.write(jsonDoc.toJson());
file.commit();

In the file, I get 0 instead of 0.0.

[JonB]

@niks_entire
You cannot do this. Unless you save it as a string, "0.0", but that's a different data type.

JSON has only one numerical type, "number". This covers integers and floating point. You cannot control how it outputs the number. 0 will be its representation for the number with value zero, you cannot make it output 0.0 for a number.