std::isnan 定义于头文件<cmath> boolisnan(floatarg); (1)(C++11 起) boolisnan(doublearg); (2)(C++11 起) boolisnan(longdoublearg); (3)(C++11 起) boolisnan(IntegralType arg); (4)(C++11 起) 1-3)确定给定的浮点数arg是否为非数( NaN )值。
fvar<double> e = multiply_log(x, w);isnan(e.val_);isnan(e.d_); } 开发者ID:javaosos,项目名称:stan,代码行数:33,代码来源:multiply_log_test.cpp 示例2: TEST ▲点赞 7▼ TEST(AgradFwdHypot,Fvar) {usingstan::agrad::fvar;usingboost::math::hypot;usingstd::isnan; fvar<double> ...
@文心快码BaiduComatestd::isnan函数头文件 文心快码BaiduComatestd::isnan函数是C++标准库中的一个函数,用于检测给定的浮点数是否为NaN(Not-A-Number,非数字)。在C++中,这个函数定义在<cmath>头文件中。 以下是对问题的详细回答: std::isnan函数的作用: std::isnan函数用于检测给定的浮点数是否为...
std::isnan 定义于头文件<cmath> boolisnan(floatarg); (1)(C++11 起) boolisnan(doublearg); (2)(C++11 起) boolisnan(longdoublearg); (3)(C++11 起) boolisnan(IntegralType arg); (4)(C++11 起) 1-3)确定给定的浮点数arg是否为非数( NaN )值。
(Inf) = "<< std::isnan(INFINITY) <<'\n'<<"isnan(0.0) = "<< std::isnan(0.0) <<'\n'<<"isnan(DBL_MIN/2.0) = "<< std::isnan(DBL_MIN/2.0) <<'\n'<<"isnan(0.0 / 0.0) = "<< std::isnan(0.0/0.0) <<'\n'<<"isnan(Inf - Inf) = "<< std::isnan(INFINITY -...
(Inf) = "<<std::isnan(INFINITY)<<'\n'<<"isnan(0.0) = "<<std::isnan(0.0)<<'\n'<<"isnan(DBL_MIN/2.0) = "<<std::isnan(DBL_MIN/2.0)<<'\n'<<"isnan(0.0 / 0.0) = "<<std::isnan(0.0/0.0)<<'\n'<<"isnan(Inf - Inf) = "<<std::isnan(INFINITY-INFINITY)<<'\...
如果isNaN函数的参数不是Number类型， isNaN函数会首先尝试将这个参数转换为数值，然后才会对转换后的结果...
std::isnan Defined in header<cmath> (1) boolisnan(floatnum);boolisnan(doublenum);boolisnan(longdoublenum); (since C++11) (until C++23) constexprboolisnan(/* floating-point-type */num); (since C++23) Additional overloads Defined in header<cmath> ...
std::isnan std::isnormal std::isunordered std::labs std::laguerre std::laguerref std::laguerrel std::lcm std::ldexp std::ldiv std::legendre std::legendref std::legendrel std::lgamma std::linear_congruential_engine std::linear_congruential_engine::discard std::linear_congruential_engine::...
std::cout << std::boolalpha << "isnan(NaN) = " << std::isnan(NAN) << '\n' << "isnan(Inf) = " << std::isnan(INFINITY) << '\n' << "isnan(0.0) = " << std::isnan(0.0) << '\n' << "isnan(DBL_MIN/2.0) = " << std::isnan(DBL_MIN/2.0) << '\n...