stdlib.h

int rand( void )

Returns a random number between 0 and RAND_MAX

void abort( void )

Raises the abort signal

int abs( int  j )

Returns the absolute value of a given integer

int atexit( void  (*func)( void ) )

adds a function to the list of things to be called upon program exit

int atoi( const  char  * s )

Converts a string to an int

long int atol( const  char  * s )

Converts a string to a long int

long long int atoll( const  char  * s )

Converts a string to a long long

void * bsearch( const  void  * key, const  void  * base, size_t  nmemb, size_t  size, int  (*compar)( const void *, const void * ) )

Performs a binary search inside an array of nmemb itens of size bytes

void * calloc( size_t  nmemb, size_t  size )

Allocates nmemb consecutive blocks of size bytes, and zeroes the memory

div_t div( int  numer, int  denom )

Performs a division on integers both the quotient and remainder are stored in a div_t (_PDCLIB_div_t) struct

void exit( int  status )

exits the program with a given status code

void free( void  * ptr )

Deallocates a block of memory created by malloc calloc or realloc.

long int labs( long  int  j )

Returns the absolute value of a given long int

ldiv_t ldiv( long  int  numer, long  int  denom )

Performs a division on long ints both the quotient and remainder are stored in a ldiv_t (_PDCLIB_ldiv_t) struct

long long int llabs( long long  int  j )

Returns the absolute value of a given long long

lldiv_t lldiv( long long  int  numer, long long  int  denom )

Performs a division on long longs both the quotient and remainder are stored in a lldiv_t (_PDCLIB_lldiv_t) struct

void * malloc( size_t  size )

Allocates size bytes of memory

void qsort( void  * base, size_t  nmemb, size_t  size, int  (*compar)( const void *, const void * ) )

Sorts an array in memory

void * realloc( void  * ptr, size_t  size )

Attempts to resize the allocated block of memory given in ptr.

void srand( unsigned  int  seed )

Sets the new seed to be used by rand

long int strtol( const  char  * s, char  ** endptr, int  base )

Converts a string in s to an long.

long long int strtoll( const  char  * s, char  ** endptr, int  base )

Converts a string in s to an long long.

unsigned long int strtoul( const  char  * s, char  ** endptr, int  base )

Converts a string in s to an unsigned long.

unsigned long long int strtoull( const  char  * s, char  ** endptr, int  base )

Converts a string in s to an unsigned long long.

void _Exit( int  status )

exits the program with a given status code, without running atexit scripts