std::nextafter,std::nextafterf,std::nextafterl,std::nexttoward,std::nexttowardf,std::nexttowardl 在标头<cmath>定义 (1) floatnextafter(floatfrom,floatto); doublenextafter(doublefrom,doubleto); longdoublenextafter(longdoublefrom,longdoubleto); ...
long double nextafterl( long double from, long double to ); (3) (C++11 起) Promoted nextafter ( Arithmetic1 from, Arithmetic2 to ); (4) (C++11 起) float nexttoward ( float from, long double to ); float nexttowardf( float from, long double to ); (5) (C++11 起) double ...
float nextafter ( float from, float to ); float nextafterf( float from, float to ); (1) (C++11 起) double nextafter ( double from, double to ); (2) (C++11 起) long double nextafter ( long double from, long double to ); long double nextafterl( long double from, long double...
I tested the following code and found that the execution time was too slow compared to gcc. #include <cmath> #include <benchmark/benchmark.h> void nextafter(benchmark::State& s) { while (s.KeepRunning()) std::nextafter(1.25e+100, INFINITY); } BENCHMARK(nextafter); BENCHMARK_MAIN()...
For a templated implementation the rounding offset would ideally computed as constexpr T rndofs = std::nextafter (T(0.5), T(0)); but I find that compilers do not accept that. I have tried to work around this in semi-portable fashion in the code below. #include <cmath> ...
double d1 = 1.5; double d2 = 123456.789; std::cout << "value1: " << d1 << std::endl; std::cout << "value2: " << d2 << std::endl; std::cout << "maximum number of significant decimal digits (value1): " << -std::log10(std::nextafter(d1, std::numeric_limits<double...
nextafterf() (C++11 起)nextafterl() (C++11 起)nexttoward() (C++11 起)nexttowardf() (C++11 起)nexttowardl() (C++11 起)noemit_on_flush<>() (C++20 起)noboolalpha()none_of<>() (C++11 起)noop_coroutine() (C++20 起)noop_coroutine_handle (C++20 起)noop_coroutine_promise (C++20...
如果我没有错,那么对机器Epsilon的定义是满足条件的最低数: 我试着使用std::numeric_limits<float>::epsilon()来测试这个值,但是如果您尝试用std::nextafter获得先前的浮点数,这个值并不能满足这个要求。 #include <cmath> #include <iostream> #include <limits> int main() { float e = std::nu...
此外,该文件还提供了一些特定于Windows的数学工具。例如,nextafter函数用于在两个浮点数之间返回最接近第一个参数的下一个浮点数。cbrt函数用于计算浮点数的立方根。这些工具和函数的定义都是根据Windows操作系统上的数学库进行的,并针对Rust提供了对应的封装和接口。
#include <iostream> #include <limits> #include <cmath> #include <cfenv> int main() { std::cout << "舍入前是否检测下溢:" << std::boolalpha << std::numeric_limits<double>::tinyness_before << '\n'; double denorm_max = std::nextafter(std::numeric_limits<double>::min(), 0); ...