@Ronhald OK, I've been digging around in this. Unfortunately, the debug helpers seem to focused on providing a more human-friendly depiction of complex structures. For basic integers the displayed data is actually formatted by Qt Creator's C++ code using QString::number(). This suppresses leading zeros.

It may be possible to customise the Qt Creator source to take into consideration the sizeof(IntType) to generate a string of appropriate length.

And that binary contains just that ?

@CJha said in How to write entire QVector to a binary file?:

If it's a copy then I assume it is always going to be the data

No, because Qt containers use copy-on-write. See https://doc.qt.io/qt-5/implicit-sharing.html

@mrjj thank you)

@Dan90 You are assigning a value to a pointer, but data is actually an array of "unsigned char":

unsigned char *data = 0b10000000;

Instead you should do (C++11):

unsigned char data[] = { (unsigned char)0b10000000 };

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