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densities
densities
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operators (std::bernoulli_distribution)
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operators (std::discrete_distribution)
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operators (std::fisher_f_distribution)
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operators (std::linear_congruential_engine)
operators (std::linear_congruential_engine)
operators (std::lognormal_distribution)
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operators (std::mersenne_twister_engine)
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operators (std::negative_binomial_distribution)
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operators (std::normal_distribution)
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operators (std::piecewise_constant_distribution)
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operators (std::weibull_distribution)
Pseudo-random number generation
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std::begin(std::valarray)
std::bernoulli_distribution
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std::imag(std::complex)
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std::polar(std::complex)
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std::shuffle_order_engine::seed
std::shuffle_order_engine::shuffle_order_engine
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std::sin(std::valarray)
std::sinh
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std::slice
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std::slice_array::operators
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std::subtract_with_carry_engine
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std::subtract_with_carry_engine::seed
std::subtract_with_carry_engine::subtract_with_carry_engine
std::swap(std::valarray)
std::tan
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std::tan(std::valarray)
std::tanh
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std::tgamma
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std::uniform_int_distribution
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std::uniform_int_distribution::max
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std::uniform_int_distribution::reset
std::uniform_int_distribution::uniform_int_distribution
std::uniform_real_distribution
std::uniform_real_distribution::a
std::uniform_real_distribution::max
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std::uniform_real_distribution::reset
std::uniform_real_distribution::uniform_real_distribution
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std::valarray::max
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std::valarray::swap
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std::weibull_distribution
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std::weibull_distribution::param
std::weibull_distribution::reset
std::weibull_distribution::weibull_distribution
stddev
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std::isunordered

STD：等号

Defined in header ​​
bool isunordered( float x, float y (1)(since C++11)
bool isunordered( double x, double y (2)(since C++11)
bool isunordered( long double x, long double y (3)(since C++11)
bool isunordered( Arithmetic x, Arithmetic y (4)(since C++11)

1-3%29确定浮点数x和y都是无序的，也就是说，其中一个或两者都是NaN，因此无法有意义地进行比较。

4%29一组重载或函数模板，用于%281-3%29中未涵盖的所有算术类型参数组合。如果有任何争论积分型，它被铸造成double...

参数

x-floating point value
y-floating point value

返回值

true如果x或y是南false否则。

另见

fpclassify (C++11)categorizes the given floating point value (function)
isnan (C++11)checks if the given number is NaN (function)

c关于等序的文档

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在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cpPreference.com/w/cpp/数值/数学/无序

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