Function			#include
int rand()			cstdlib
int srand(int)			cstdlib
int sleep(int)			unistd.h
time_t time(0)			ctime
void assert(bool)		cassert
char tolower(char)		cctype, ctype.h
void random_shuffle(...)	algorithms

Documentation on the Standard Template Library
  Contents of Draft C++ Standard
	http://www.csci.csusb.edu/dick/c++std/cd2/index.html
  Date and Time
	http://www.csci.csusb.edu/dick/c++std/cd2/lib-utilities.html#lib.date.time
	http://www.csci.csusb.edu/dick/cs330/timing
  Strings
	http://www.csci.csusb.edu/dick/c++std/cd2/lib-strings.html#lib.string.classes
  Containers: vectors, lists, stacks, queues, deques, sets, multisets, ...
	http://www.csci.csusb.edu/dick/c++std/cd2/lib-containers.html
	http://www.csci.csusb.edu/dick/cs330/splicing
	http://www.csci.csusb.edu/dick/cs330/stacks
	http://www.csci.csusb.edu/dick/cs330/queues
	http://www.csci.csusb.edu/dick/cs330/deque.txt
	http://www.csci.csusb.edu/dick/cs330/comparison.txt
  Iterators
	http://www.csci.csusb.edu/dick/c++std/cd2/lib-iterators.html
  Algorithms
	http://www.csci.csusb.edu/dick/c++std/cd2/lib-algorithms.html