How much memory to allow for a 30 character string?

Guerrian

I see that sizeof returns 8 for a QString:

QString s;
s = "012345678901234567890123456789";
qDebug() << sizeof(s);

How much more memory is taken up by the characters, is it 1 byte per character?

mpergand

Hi,

sizeof return the size of an object:

qDebug() << sizeof(QString); // -> 8

A QString is composed of 16 bits unicode characters.
Hence the size in memory is equal to:

2*s.size()
or
sizeof(QChar)*s.size();

SGaist

Hi,

@Guerrian out of curiosity, are you only interested in the space taken by the chars or the complete data structure that is QString ?

Solved How much memory to allow for a 30 character string?