Qt supports the basic types of int, long, float, long, but in order to unify the uniform length on each platform, typedef is used to define the symbol of the type.
Qt data type Equivalent definition Number of bytes
qint8 signed char 1
qint16 signed short 2
qint32 signed int 4
qint64 long long 8
qlonglong long long 8
quint8 unsigned char 1
quint16 unsigned short 2
quint32 unsigned int 4
quint64 unsigned long long 8
qulonglong unsigned long long 8
uchar unsigned char 1
ushort unsigned short 2
uint unsigned int 4
ulong unsigned long 8
qreal double 8
qfloat16 2
The basic library
<QtMath> provides basic mathematical operations.
Log output: qPrintable (), qDebug (), qInfo (), qWarning (), qCritical (), qFatal ().
