标准库标头 <cmath>C++ 标准库头 此标头原作为 <math.h> 存在于 C 标准库。 此头文件是数值库的一部分。 类型 float_t (C++11) 至少和 float 一样宽的最高效浮点数类型 (typedef) double_t (C++11) 至少和 double 一样宽的最高效浮点数类型 (typedef) 宏 HUGE_VALFHUGE_VALHUGE_VALL (...
头文件<cmath>提供标准 C 库数学函数,例如std::fabs、std::sqrt及std::sin。 数学特殊函数(C++17 起) 头文件<cmath>亦提供数个特殊数学函数,例如std::beta、std::hermite及std::cyl_bessel_i。 数学常数(C++20 起) 头文件<numbers>提供数个数学常数,例如std::numbers::pi或std::numbers::sqrt2。
constexpr for <cmath> and <cstdlib> (FTM)* P0533R9 4.6 (partial)* std::unreachable() (FTM)* P0627R6 12 15 19.32* 14.0.3* Deprecating std::aligned_storage and std::aligned_union P1413R3 13 16 19.33* std::reference_constructs_from_temporary & std::reference_converts_from_tempora...
The header<cmath>providesstandard C library mathematical functionssuch asstd::fabs,std::sqrt, andstd::sin. Mathematical special functions(since C++17) The header<cmath>also provides several mathematical special functions such asstd::beta,std::hermite, andstd::cyl_bessel_i. ...
Modifica el tipo entero. Pueden mezclarse en cualquier orden. Solamente uno de cada grupo puede estar presente en el nombre del tipo. Signo signed- El tipo de destino tendrá una representación con signo (este es el modificador por defecto si se omite). ...
#include <iostream> #include <cmath> // 导入库 int main() { // sqrt() 来自 cmath std::cout << sqrt(9); } Lambda 表达式 Lambda 表达式可以在函数内定义,可以理解为在函数内定义的临时函数。格式: auto func = []() -> return_type { }; []为捕获列表,能够捕获其所在函数的局部变量 ...
Elemento definito nell'header<cmath> floatlog1p(floatarg); (dal C++11) doublelog1p(doublearg); (dal C++11) longdoublelog1p(longdoublearg); (dal C++11) doublelog1p(Integral arg); (dal C++11) Calcola la naturale (basee) logaritmo1+arg. Questa funzione è più preciso l'espressionestd:...
cmath vector array fstream sstream list set utility map queue Iterations for-statement while-statement do-while-statement Statements if-statement if-else-statement else-if-statement ternary-operator Functions Syntax function function-with-parameters function-with-return-value function-with-parameter-and-ret...
cmathmathematical functions Constants in C++constants ctimetime Input/Output LibraryDescription iostreamHeader that defines the standard input/output stream objects fstreamHeader that defines the standard input/output stream objects of files Macros
<locale.h> (deprecated) behaves as if each name from <clocale> is placed in global namespace <math.h> (deprecated) behaves as if each name from <cmath> is placed in global namespace <setjmp.h> (deprecated) behaves as if each name from <csetjmp> is placed in global namespace ...