QRandomGenerator64 类允许从高品质、无种子随机数生成器获取一 64 位随机值。 更多...
| 头： | #include <QRandomGenerator64> |
| qmake: | QT += core |
| Since: | Qt 5.10 |
| 继承： | QRandomGenerator |
该类在 Qt 5.10 引入。
| typedef | result_type |
| quint64 | generate () |
| QRandomGenerator64::result_type | operator() () |
QRandomGenerator64 is a simple adaptor class around QRandomGenerator , making the QRandomGenerator::generate64 () function the default for operator ()(), instead of the function that returns 32-bit quantities. This class is intended to be used in conjunction with Standard Library algorithms that need 64-bit quantities instead of 32-bit ones.
In all other aspects, the class is the same. Please refer to QRandomGenerator 's documentation for more information.
另请参阅 QRandomGenerator .
A typedef to the type that operator () returns. That is, quint64.
另请参阅 operator ().
Generates one 64-bit random value and returns it.
Note about casting to a signed integer: all bits returned by this function are random, so there's a 50% chance that the most significant bit will be set. If you wish to cast the returned value to qint64 and keep it positive, you should mask the sign bit off:
qint64 value = QRandomGenerator64::generate() & std::numeric_limits<qint64>::max();
另请参阅 QRandomGenerator and QRandomGenerator::generate64 ().
Generates a 64-bit random quantity and returns it.
另请参阅 QRandomGenerator::generate () 和 QRandomGenerator::generate64 ().