Linux Manuals session 3

std::chi_squared_distribution – std::chi_squared_distribution Synopsis Defined in header <random> template< class RealType = double > (since C++11) class chi_squared_distribution; The chi_squared_distribution produces random numbers x>0 according to the Chi-squared_distribution:       f(x;n) =       x(n/2)-1       e-x/2       Γ(n/2) 2n/2 Γ is the Gamma_function (See also std::tgamma) and n are the degrees_of_freedom (default 1). std::chi_squared_distribution satisfies all requirements of RandomNumberDistribution Template…

std::chars_format – std::chars_format Synopsis Defined in header <charconv> enum class chars_format { scientific = /*unspecified*/, fixed = /*unspecified*/, (since C++17) hex = /*unspecified*/, general = fixed | scientific }; A BitmaskType used to specify floating-point formatting for std::to_chars and std::from_chars See also to_chars converts an integer or floating-point value to a character sequence            (function) (C++17)…

std::char_traits<CharT>::to_int_type – std::char_traits<CharT>::to_int_type Synopsis static int_type to_int_type( char_type c ); (until C++11) static constexpr int_type to_int_type( char_type c ) noexcept; (since C++11) Converts a value of char_type to int_type. Parameters c – value to convert Return value A value equivalent to c. Complexity Constant. Notes For every valid value of char_type, there must be a…

std::char_traits<CharT>::to_char_type – std::char_traits<CharT>::to_char_type Synopsis static char_type to_char_type( int_type c ); (until C++11) static constexpr char_type to_char_type( int_type c ) noexcept; (since C++11) Converts a value of int_type to char_type. If there are no equivalent value (such as when c is a copy of the eof value), the results are unspecified. Formally, returns the value x…

std::char_traits<CharT>::not_eof – std::char_traits<CharT>::not_eof Synopsis static int_type not_eof( int_type e ); (until C++11) static constexpr int_type not_eof( int_type e ) noexcept; (since C++11) Checks whether e is not equivalent to eof value. Formally * if X::eq_int_type(e, X::eof()) is false, returns e * otherwise, returns a value f such that X::eq_int_type(f, X::eof()) is false Parameters e –…

std::char_traits<CharT>::move – std::char_traits<CharT>::move Synopsis static char_type *move(char_type *dest, const char_type *src, std::size_t count); (until C++ 20) static constexpr char_type *move(char_type *dest, const char_type *src, std::size_t count); (since C++ 20) Copies count character from character string pointed to by src to character string pointed to by dest. Performs correctly even if the copied character ranges overlap,…

std::char_traits<CharT>::length – std::char_traits<CharT>::length Synopsis static std::size_t length(const char_type *s); (until C++ 17) static constexpr std::size_t length(const char_type *s); (since C++ 17) Returns the length of the character sequence pointed to by s, that is, the position of the terminating null character (CharT()). Parameters s – pointer to a character sequence to return length of Return…

std::char_traits<CharT>::find – std::char_traits<CharT>::find Synopsis static const char_type *find(const char_type *p, std::size_t count, const char_type &ch); (until C++ 17) static constexpr const char_type *find(const char_type *p, std::size_t count, const char_type &ch); (since C++ 17) Searches for character ch within the first count characters of the sequence pointed to by p. Parameters p – pointer to a…

std::char_traits<CharT>::eq_int_type – std::char_traits<CharT>::eq_int_type Synopsis static bool eq_int_type( int_type c1, int_type c2 ); (until C++11) static constexpr bool eq_int_type( int_type c1, int_type c2 ) noexcept; (since C++11) Checks whether two values of type int_type are equal. Formally, * if there exist values a and b such that c1 == X::to_int_type(a) and c2 == X::to_int_type(b), yields the…

std::char_traits<CharT>::eq,std::char_traits<CharT>::lt – std::char_traits<CharT>::eq,std::char_traits<CharT>::lt Synopsis static bool eq( char_type a, char_type b ); (until C++11) static constexpr bool eq( char_type a, char_type b ) noexcept; (1) (since C++11) static bool lt( char_type a, char_type b ); (2) (until C++11) static constexpr bool lt( char_type a, char_type b ) noexcept; (since C++11) Compares two characters. 1) Compares…

std::char_traits<CharT>::eof – std::char_traits<CharT>::eof Synopsis static int_type eof(); (until C++11) static constexpr int_type eof() noexcept; (since C++11) Returns a value not equivalent to any valid value of type char_type. Formally, returns a value e such that X::eq_int_type(e, X::to_int_type(c)) is false for all values c. Parameters (none) Return value A value not equivalent to any valid value…

std::char_traits<CharT>::copy – std::char_traits<CharT>::copy Synopsis static char_type *copy(char_type *dest, const char_type *src, std::size_t count); (until C++ 20) static constexpr char_type *copy(char_type *dest, const char_type *src, std::size_t count); (since C++ 20) Copies count character from character string pointed to by src to character string pointed to by dest. Formally, for each i in [0, count), performs assign(src[i],…

std::char_traits<CharT>::compare – std::char_traits<CharT>::compare Synopsis static int compare(const char_type *s1, const char_type *s2, std::size_t count); (until C++ 17) static constexpr int compare(const char_type *s1, const char_type *s2, std::size_t count); (since C++ 17) Compares the first count characters of the character strings s1 and s2. The comparison is done lexicographically. If count is zero, strings are considered…

std::char_traits<CharT>::assign – std::char_traits<CharT>::assign Synopsis static void assign(char_type &r, const char_type &a); (until C++ 11) static void assign(char_type &r, const char_type &a) noexcept; (since C++ 11)(until C++ 17) static constexpr void assign(char_type &r, const char_type &a) noexcept; (1)(since C++ 17) static char_type *assign(char_type *p, std::size_t count, char_type a); (until C++ 20) static constexpr char_type *assign(char_type *p,…

std::char_traits – std::char_traits Synopsis Defined in header <string> template< class CharT > class char_traits; The char_traits class is a traits class template that abstracts basic character and string operations for a given character type. The defined operation set is such that generic algorithms almost always can be implemented in terms of it. It is thus…

std::cerr,std::wcerr – std::cerr,std::wcerr Synopsis Defined in header <iostream> extern std::ostream cerr; (1) extern std::wostream wcerr; (2) The global objects std::cerr and std::wcerr control output to a stream buffer of implementation-defined type (derived from std::streambuf and std::wstreambuf, respectively), associated with the standard C error output stream stderr. These objects are guaranteed to be initialized during or…

std::ceil2 – std::ceil2 Synopsis Defined in header <bit> template< class T > (since C++20) constexpr T ceil2(T x) noexcept; Calculates the smallest integral power of two that is not smaller than x. If that value is not representable in T, the result is unspecified. This overload only participates in overload resolution if T is an…

std::ceil,std::ceilf,std::ceill – std::ceil,std::ceilf,std::ceill Synopsis Defined in header <cmath> float ceil ( float arg ); float ceilf( float arg ); (since C++11) double ceil ( double arg ); (1) (2) long double ceil ( long double arg ); long double ceill( long double arg ); (3) (since C++11) double ceil ( IntegralType arg ); (4) (since…

std::cbrt,std::cbrtf,std::cbrtl – std::cbrt,std::cbrtf,std::cbrtl Synopsis Defined in header <cmath> float cbrt ( float arg ); (1) (since C++11) float cbrtf( float arg ); double cbrt ( double arg ); (2) (since C++11) long double cbrt ( long double arg ); (3) (since C++11) long double cbrtl( long double arg ); double cbrt ( IntegralType arg );…

std::cauchy_distribution< _RealType >::param_type – Synopsis Public Types typedef cauchy_distribution < _RealType > distribution_type" Public Member Functions param_type (_RealType __a=_RealType(0), _RealType __b=_RealType(1)) _RealType a () const _RealType b () const Friends bool operator== (const param_type &__p1, const param_type &__p2) Detailed Description template<typename _RealType = double>struct std::cauchy_distribution< _RealType >::param_type Parameter type. Definition at line 2938 of file…