stdlib.h summary

Functions:

	abort	Abort current process returning error code
	abs	Return absolute value of integer parameter
	atexit	Specifies a function to be executed at exit
	atof	Convert string to double
	atoi	Convert string to integer
	atol	Convert string to long
	bsearch	Binary search
	calloc	Allocate array in memory
	div	Divide two integer values
*	ecvt	Convert floating point value to string
	exit	Terminate calling process
*	fcvt	Convert floating point value to string
	free	Deallocate dynamically allocated memory
*	gcvt	Convert floating point value to string
	getenv	Get string from environment
*	itoa	Convert integer to string
	labs	Return absolute calue of long integer parameter
	ldiv	Divide two long integer values
*	lfind	Linear search
*	lsearch	Linear search
*	ltoa	Convert long integer value to string
	malloc	Allocate memory block
*	max	Return the greater of two parameters
*	min	Return the smaller of two parameters
*	putenv	Create or modify environment variable
	qsort	Sort using quicksort algorithm
	rand	Generate random number
	realloc	Reallocate memory block
	srand	Initialize random number generator
	strtod	Convert string to double-precision floating-point value
	strtol	Convert string to long integer
	strtoul	Convert string to unsigned long integer
*	swab	Swap bytes
	system	Execute command
*	ultoa	Convert unsigned long integer to string

stdlib.h summary:

conversion:

atof, atoi, atol, ecvt, fcvt, itoa, ltoa, strtod, strtol, strtoul, ultoa

dynamic memory allocation/deallocation:

calloc, free, malloc, realloc

process control and environment variables:

abort, atexit, exit, getenv, putenv, system

sorting and searching:

bsearch, lfind, lsearch, qsort, swab

mathematical operations:

abs, div, labs, ldiv

Notes

NULL

NULL is a defined constant used to express null pointers, that is, an unassigned pointer or a pointer that points nowhere. It is defined as:

#define NULL 0

size_t

Defined type used as arguments for some functions that require sizes or counts specifications. This represents an unsigned value generally defined in header files as unsigned int:

typedef unsigned int size_t;