Defined in header <wchar.h> (1) wchar_t* wcstok( wchar_t* str, const wchar_t* delim, wchar_t **ptr ); (since C95) (until C99) wchar_t *wcstok(wchar_t * restrict str, const wchar_t * restrict delim, wchar_t **restrict ptr); (since C99) wchar_t *wcstok_s( wchar_t *restrict str, rsize_t *restrict strmax, const wchar_t *restrict delim, wchar_t **restrict ptr); (2) (since C11) 1) Finds the next token in a null-terminated wide strin

Functions Defined in header <stdlib.h> abslabsllabs (C99) computes absolute value of an integral value (|x|) (function) divldivlldiv (C99) computes quotient and remainder of integer division (function) Defined in header <inttypes.h> imaxabs (C99) computes absolute value of an integral value (|x|) (function) imaxdiv (C99) computes quotient and remainder of integer division (function) Defined in header <math.h> Basic operations fa

Defined in header <threads.h> int cnd_timedwait( cnd_t* restrict cond, mtx_t* restrict mutex, const struct timespec* restrict time_point ); (since C11) Atomically unlocks the mutex pointed to by mutex and blocks on the condition variable pointed to by cond until the thread is signalled by cnd_signal or cnd_broadcast, or until the TIME_UTC based time point pointed to by time_point has been reached. The mutex is locked again before the function returns. The

Defined in header <stdio.h> (1) FILE *fopen( const char *filename, const char *mode ); (until C99) FILE *fopen( const char *restrict filename, const char *restrict mode ); (since C99) errno_t fopen_s(FILE *restrict *restrict streamptr, const char *restrict filename, const char *restrict mode); (2) (since C11) 1) Opens a file indicated by filename and returns a pointer to the file stream associated with that file. mode is used to

Defined in header <locale.h> struct lconv; The struct lconv contains numeric and monetary formatting rules as defined by a C locale. Objects of this struct may be obtained with localeconv. The members of lconv are values of type char and of type char*. Each char* member except decimal_point may be pointing at a null character (that is, at an empty C-string). The members of type char are all non-negative numbers, any of which may be CHAR_MAX if the corresponding value is not

Defined in header <cctype> int isprint( int ch ); Checks if the given character can be printed, i.e. it is either a number (0123456789), an uppercase letter (ABCDEFGHIJKLMNOPQRSTUVWXYZ), a lowercase letter (abcdefghijklmnopqrstuvwxyz), a punctuation character(!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~), or space, or any character classified as printable by the current C locale. The behavior is undefined if the value of ch is not representable as unsigned char and is not equ

Pointer is a type of an object that refers to a function or an object of another type, possibly adding qualifiers. Pointer may also refer to nothing, which is indicated by the special null pointer value. Syntax In the declaration grammar of a pointer declaration, the type-specifier sequence designates the pointed-to type (which may be function or object type and may be incomplete), and the declarator has the form: * qualifiers(optional) declarator (1) where declarator may be the iden

Defined in header <math.h> float nearbyintf( float arg ); (1) (since C99) double nearbyint( double arg ); (2) (since C99) long double nearbyintl( long double arg ); (3) (since C99) Defined in header <tgmath.h> #define nearbyint( arg ) (4) (since C99) 1-3) Rounds the floating-point argument arg to an integer value in floating-point format, using the current rounding mode. 4) Type-generic macro: If arg has type long double, nearbyin

Defined in header <complex.h> #define I /* unspecified */ (since C99) The I macro expands to either _Complex_I or _Imaginary_I. If the implementation does not support imaginary types, then the macro always expands to _Complex_I. A program may undefine and perhaps then redefine the macro I. Notes The macro is not named i, which is the name of the imaginary unit in mathematics, because the name i was already used in many C programs, e.g. as a loop counter variable. The mac

Defined in header <stdlib.h> div_t div( int x, int y ); (1) ldiv_t ldiv( long x, long y ); (2) lldiv_t lldiv( long long x, long long y ); (3) (since C99) Defined in header <inttypes.h> imaxdiv_t imaxdiv( intmax_t x, intmax_t y ); (4) (since C99) Computes both the quotient and the remainder of the division of the numerator x by the denominator y. Computes quotient and remainder simultaneously. The quotient is the algebraic quotient wi