C header file: <stdlib.h> - Conversion, memory, process control, sort and search, mathematics

Last update on September 06 2023 12:52:16 (UTC/GMT +8 hours)

stdlib.h is the header of the general purpose standard library of C programming language which includes functions involving numeric conversion functions, pseudo-random numbers generation functions, memory allocation, process control functions.

The <stdlib.h> include file declares the stdlib manipulation functions:

A complete table of stdlib Lybrary:

Name	Description
atof() function	Convert character string to float.
atoi() function	Convert a string to an integer.
atol() function	Convert a string to a long integer.
strtod() function	Convert strings to a double-precision value.
strtol() function	Convert a string to a long integer.
strtoul() function	Convert a string to an unsigned long.
calloc() function	A memory allocator.
free() function	Free allocated memory.
malloc() function	A memory allocator.
realloc() function	Reallocate memory blocks.
abort() function	Stop a process.
atexit() function	Processes the specified function at exit.
exit()function	Terminate a process.
getenv()function	Get value of an environment variable.
system()function	Issue a command.
bsearch()function	Binary search a sorted table.
qsort()function	Sort a table of data.
abs()function	Calculate integer absolute value.
div()function	Calculate quotient and remainder.
labs()function	long integer absolute value.
ldiv()function	Long and Long Long Division.
rand()function	Pseudo-random number generator.
srand()function	Pseudo-random number generator.
mblen()function	Get number of bytes in a character.
mbstowcs()function	Convert a character string to a wide-character string.
mbtowc()function	Convert a character to a wide-character code.
wcstombs()function	Convert a wide-character string to a character string.
wctomb()function	Convert a wide-character code to a character.

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