stdlib.h File Reference

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Data Structures
struct	div_t
struct	ldiv_t
struct	lldiv_t

Functions
void	exit (int status)
	To cause task termination. More...
void *	malloc (size_t size)
	Allocate a memory space. More...
void	free (void *ptr)
	Free a memory space. More...
void *	calloc (size_t nmemb, size_t size)
	Allocate and reset a memory space of an array. More...
char *	itoa (int value, char *buffer, int radix)
char *	utoa (unsigned int value, char *buffer, int radix)
char *	ltoa (long value, char *buffer, int radix)
char *	ultoa (unsigned long value, char *buffer, int radix)
int	atoi (const char *nptr)
long	atol (const char *nptr)
long long	atoll (const char *nptr)
long	a64l (const char *str64)
int	abs (int j)
double	atof (const char *nptr)
void *	bsearch (const void *key, const void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *))
div_t	div (int numerator, int denominator)
int	getsubopt (char **optionp, char *const *tokens, char **valuep)
char *	l64a (long value)
long	labs (long j)
ldiv_t	ldiv (long numerator, long denominator)
long long	llabs (long long j)
lldiv_t	lldiv (long long numerator, long long denominator)
int	mblen (const char *s, size_t n)
size_t	mbstowcs (wchar_t *dest, const char *src, size_t n)
int	mbtowc (wchar_t *pwc, const char *s, size_t n)
void	qsort (void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *))
char *	realpath (const char *path, char *resolved_path)
double	strtod (const char *nptr, char **endptr)
float	strtof (const char *nptr, char **endptr)
long	strtol (const char *nptr, char **endptr, int base)
long double	strtold (const char *nptr, char **endptr)
long long	strtoll (const char *nptr, char **endptr, int base)
unsigned long	strtoul (const char *nptr, char **endptr, int base)
unsigned long long	strtoull (const char *nptr, char **endptr, int base)
size_t	wcstombs (char *dest, const wchar_t *src, size_t n)
int	wctomb (char *s, wchar_t wc)

Function Documentation

calloc()

void* calloc	(	size_t	nmemb,
		size_t	size
	)

Allocate and reset a memory space of an array.

Parameters

nmemb	Size of the array element.
size	The number of array elements.

Return values

void	*: The pointer to the allocated memory. If the allocation failed, the function returns NULL.

exit()

void exit

(

int

status

)

To cause task termination.

Parameters

status

Not used.

Return values

None

free()

void free

(

void *

ptr

)

Free a memory space.

Parameters

ptr	Pointer to the allocated memory.

Return values

None

malloc()

void* malloc

(

size_t

size

)

Allocate a memory space.

Parameters

size	The number of bytes for allocating a memory space.

Return values

void	*: The pointer to the allocated memory. If the allocation failed, the function returns NULL.