如何使用 boost random 生成随机 64 位整数
我正在尝试使用 boost random 生成随机 64 位无符号整数， 但我遇到了uniform_int 的断言失败。
struct timeval tv;
boost::mt19937 randGen(tval.tv_usec);
boost::uniform_int<> uInt64Dist(0, std::numeric_limits<uint64_t>::max());
boost::variate_generator<boost::mt19937&, boost::uniform_int<> > getRand(randGen, uInt64Dist);
uint64_t clock_seq_= getRand();
这是第 3 行的输出。
main:/usr/include/boost/random/uniform_int.hpp:48: boost::uniform_int<IntType>::uniform_int(IntType, IntType) [with IntType = int]: Assertion `min_arg <= max_arg' failed.
编辑：根据您的答案，我尝试使用以下内容指定大小：
boost:uniform_int<uint64_t> ....
但出现以下编译错误：
spec.cpp: In member function ‘void Specifier::initialize()’:
spec.cpp:58: error: no matching function for call to ‘boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >::variate_generator(boost::mt19937&, boost::uniform_int<long unsigned int>&)’
/usr/include/boost/random/variate_generator.hpp:97: note: candidates are: boost::variate_generator<Engine, Distribution>::variate_generator(Engine, Distribution) [with Engine = boost::mt19937&, Distribution = boost::uniform_int<int>]
/usr/include/boost/random/variate_generator.hpp:87: note: boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >::variate_generator(const boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >&)
make: *** [spec.o] Error 1
编辑：好的，错过了 boost::uniform_int 的第二个实例。一旦我得到了他们两个，一切就都过去了。
I'm trying to generate a random 64bit unsigned integer using boost random,
but I'm getting an assertion failure with uniform_int.
struct timeval tv;
boost::mt19937 randGen(tval.tv_usec);
boost::uniform_int<> uInt64Dist(0, std::numeric_limits<uint64_t>::max());
boost::variate_generator<boost::mt19937&, boost::uniform_int<> > getRand(randGen, uInt64Dist);
uint64_t clock_seq_= getRand();
Here is what gets output at line 3.
main:/usr/include/boost/random/uniform_int.hpp:48: boost::uniform_int<IntType>::uniform_int(IntType, IntType) [with IntType = int]: Assertion `min_arg <= max_arg' failed.
EDIT: Based on your answers, I tried to specify the size with below:
boost:uniform_int<uint64_t> ....
But I get the following compilation error:
spec.cpp: In member function ‘void Specifier::initialize()’:
spec.cpp:58: error: no matching function for call to ‘boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >::variate_generator(boost::mt19937&, boost::uniform_int<long unsigned int>&)’
/usr/include/boost/random/variate_generator.hpp:97: note: candidates are: boost::variate_generator<Engine, Distribution>::variate_generator(Engine, Distribution) [with Engine = boost::mt19937&, Distribution = boost::uniform_int<int>]
/usr/include/boost/random/variate_generator.hpp:87: note: boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >::variate_generator(const boost::variate_generator<boost::mt19937&, boost::uniform_int<int> >&)
make: *** [spec.o] Error 1
EDIT: ok, missed the second instance of boost::uniform_int. Once I got both of them, it's all go.
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uniform_int默认值以int作为值类型。请改用以下内容：以下行也是如此：
uniform_intdefaults tointas the value type. Use the following instead:The same goes for the following line:
您需要在
boost::uniform_int<>声明中指定您使用的是 64 位整数类型。否则默认为32位类型。you need to specify in your declaration of
boost::uniform_int<>that you are using a 64 bit integer type. Otherwise it defaults to a 32 bit type.