Question

I have a qulonglong variable and I need to convert it into QChar.
For example, from number 65 I should get ‘A’.
Or if there is a solution to make that directly into QString would be good too.

Answer 1

Qhat you need is the QChar constructor.

QChar c((short) n);

Notice that QChar provides 16 bit characters:

The QChar class provides a 16-bit Unicode character. In Qt, Unicode
characters are 16-bit entities without any markup or structure. This
class represents such an entity. It is lightweight, so it can be used
everywhere. Most compilers treat it like a unsigned short.

qlonglong is an 64 bit integer so you should be very careful with the conversion to short