Linux Manuals session 3

std::ispunct – std::ispunct Synopsis Defined in header<cctype> int ispunct(int ch); Checks if the given character is a punctuation character as classified by the current C locale. The default C locale classifies the characters !"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ as punctuation. The behavior is undefined if the value of ch is not representable as unsigned char and is not equal…

std::ispunct(std::locale) – std::ispunct(std::locale) Synopsis Defined in header<locale> template <class charT> bool ispunct(charT ch, const locale &loc); Checks if the given character is classified as an punctuation character by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as punctuation, false otherwise. Possible implementation…

std::isprint – std::isprint Synopsis Defined in header<cctype> int isprint(int ch); Checks if ch is a printable character as classified by the currently installed C locale. In the default, "C" locale, the following characters are printable: * digits (0123456789) * uppercase letters (ABCDEFGHIJKLMNOPQRSTUVWXYZ) * lowercase letters (abcdefghijklmnopqrstuvwxyz) * punctuation characters (!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~) * space () The behavior…

std::isprint(std::locale) – std::isprint(std::locale) Synopsis Defined in header<locale> template <class charT> bool isprint(charT ch, const locale &loc); Checks if the given character classified as a printable character (including space) by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as printable, false otherwise. Possible…

std::ispow2 – std::ispow2 Synopsis Defined in header <bit> template< class T > (since C++20) constexpr bool ispow2(T x) noexcept; Checks if x is an integral power of two. This overload only participates in overload resolution if T is an unsigned integer type (that is, unsigned char, unsigned short, unsigned int, unsigned long, unsigned long long,…

std::isnormal – std::isnormal Synopsis Defined in header <cmath> bool isnormal( float arg ); (1) (since C++11) bool isnormal( double arg ); (2) (since C++11) bool isnormal( long double arg ); (3) (since C++11) bool isnormal( IntegralType arg ); (4) (since C++11) 1-3) Determines if the given floating point number arg is normal, i.e. is neither…

std::isnan – std::isnan Synopsis Defined in header <cmath> bool isnan( float arg ); (1) (since C++11) bool isnan( double arg ); (2) (since C++11) bool isnan( long double arg ); (3) (since C++11) bool isnan( IntegralType arg ); (4) (since C++11) 1-3) Determines if the given floating point number arg is a not-a-number (NaN) value….

std::islower – std::islower Synopsis Defined in header<cctype> int islower(int ch); Checks if the given character is classified as a lowercase character according to the current C locale. In the default "C" locale, islower returns a nonzero value only for the lowercase letters (abcdefghijklmnopqrstuvwxyz). If islower returns a nonzero value, it is guaranteed that iscntrl, isdigit,…

std::islower(std::locale) – std::islower(std::locale) Synopsis Defined in header<locale> template <class charT> bool islower(charT ch, const locale &loc); Checks if the given character is classified as a lowercase alphabetic character by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as lowercase, false otherwise. Possible…

std::islessgreater – std::islessgreater Synopsis Defined in header <cmath> bool islessgreater( float x, float y ); (1) (since C++11) bool islessgreater( double x, double y ); (2) (since C++11) bool islessgreater( long double x, long double y ); (3) (since C++11) bool islessgreater( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…

std::islessequal – std::islessequal Synopsis Defined in header <cmath> bool islessequal( float x, float y ); (1) (since C++11) bool islessequal( double x, double y ); (2) (since C++11) bool islessequal( long double x, long double y ); (3) (since C++11) bool islessequal( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…

std::isless – std::isless Synopsis Defined in header <cmath> bool isless( float x, float y ); (1) (since C++11) bool isless( double x, double y ); (2) (since C++11) bool isless( long double x, long double y ); (3) (since C++11) bool isless( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…

std::isinf – std::isinf Synopsis Defined in header <cmath> bool isinf( float arg ); (1) (since C++11) bool isinf( double arg ); (2) (since C++11) bool isinf( long double arg ); (3) (since C++11) bool isinf( IntegralType arg ); (4) (since C++11) 1-3) Determines if the given floating point number arg is a positive or negative…

std::isgreaterequal – std::isgreaterequal Synopsis Defined in header <cmath> bool isgreaterequal( float x, float y ); (1) (since C++11) bool isgreaterequal( double x, double y ); (2) (since C++11) bool isgreaterequal( long double x, long double y ); (3) (since C++11) bool isgreaterequal( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…

std::isgreater – std::isgreater Synopsis Defined in header <cmath> bool isgreater( float x, float y ); (1) (since C++11) bool isgreater( double x, double y ); (2) (since C++11) bool isgreater( long double x, long double y ); (3) (since C++11) bool isgreater( Arithmetic x, Arithmetic y ); (4) (since C++11) 1-3) Determines if the floating…

std::isgraph – std::isgraph Synopsis Defined in header<cctype> int isgraph(int ch); Checks if the given character is graphic (has a graphical representation) as classified by the currently installed C locale. In the default C locale, the following characters are graphic: * digits (0123456789) * uppercase letters (ABCDEFGHIJKLMNOPQRSTUVWXYZ) * lowercase letters (abcdefghijklmnopqrstuvwxyz) * punctuation characters (!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~) The…

std::isgraph(std::locale) – std::isgraph(std::locale) Synopsis Defined in header<locale> template <class charT> bool isgraph(charT ch, const locale &loc); Checks if the given character classified as a graphic character (i.e. printable, excluding space) by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as graphic, false…

std::isfinite – std::isfinite Synopsis Defined in header <cmath> bool isfinite( float arg ); (1) (since C++11) bool isfinite( double arg ); (2) (since C++11) bool isfinite( long double arg ); (3) (since C++11) bool isfinite( IntegralType arg ); (4) (since C++11) 1-3) Determines if the given floating point number arg has finite value i.e. it…

std::isdigit – std::isdigit Synopsis Defined in header<cctype> int isdigit(int ch); Checks if the given character is one of the 10 decimal digits: 0123456789. The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF. Parameters ch – character to classify Return value Non-zero value if…

std::isdigit(std::locale) – std::isdigit(std::locale) Synopsis Defined in header<locale> template <class charT> bool isdigit(charT ch, const locale &loc); Checks if the given character is classified as a digit by the given locale’s std::ctype facet. Parameters ch – character loc – locale Return value Returns true if the character is classified as a digit, false otherwise. Possible implementation…