Represent a bit vector

[ChrisW67]

QBitArray ba(10);
ba.setBit(5, true);
ba.setBit(7, true);
 
QString text;
for (int i = 0; i < ba.size(); ++i)
    text += ba.testBit(i) ? "1": "0";
qDebug() << text;

QBitArray ba(10);
ba.setBit(5, true);
ba.setBit(7, true);

QString text;
for (int i = 0; i < ba.size(); ++i)
    text += ba.testBit(i) ? "1": "0";
qDebug() << text;

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You might like to reverse bit order.

If you are manipulating a small number of bits then direct use of an unsigned int is also a possibility.

unsigned int bitmap = 0;
bitmap |= 1 << 5;
bitmap |= 1 << 7;
qDebug() << QString::number(bitmap, 2);

unsigned int bitmap = 0;
bitmap |= 1 << 5;
bitmap |= 1 << 7;
qDebug() << QString::number(bitmap, 2);

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