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Filename:    Demo_Standard_Libraries_Listing.txt
Purpose:     Prototypes for various Standard Library functions and
             Explain various include files 
Comment:     Not all items are demonstrated in
             the Demo_Standard_Libraries.cpp
Author:      Ken Busbee; © 2009 Kenneth Leroy Busbee
Date:        Apr 24, 2009; Modified Mar 20, 2010
Licensed by: Kenneth Leroy Busbee under a 
             Creative Commons Attribution License (CC-BY 3.0)
             http://creativecommons.org/licenses/by/3.0/
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                                             Purpose     
Prototypes                                   Library
******************************************   ************************

int     abs(int number);                     absolute
                                             cstdlib

double  sqrt(double number);                 square root
                                             cmath

size_t  strlen(const char *str);             string length
                                             Note: you can consider
                                             size_t to be an integer
                                             cstring
        
int     system(const char *system_command);  run an os command
                                             cstdlib

void    exit(int exit_code);                 immediately stop program
                                             cstdlib

clock_t clock(void);                         thousands of seconds
                                             that the program has  
                                             been executing
                                             Note: you can consider
                                             clock_t to be a long
                                             integer  
                                             ctime

NOTE: Some prototypes may be included in more than one library

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Library   Purpose
********  ***********************************************************

iostream  Contains functions for object classes used for file I/O
          Specifically: cout and cin

fstream   Contains functions for object classes used for file I/O
          Specifically: open and close

iomanip   Contains manipulators used for I/O

          Usage               Purpose
          ******************  ***************************************
          endl                go to a new line or end this line

          setw(width)         output numbers with a specified width
                              Note: must be done just befoe every
                              output item

          fixed               makes floating-point values show in
                              non scientific (exponent) format

          setprecision(size)  how many positions after the 
                              decimal point to show

string    Contains functions for the String object class. 
          Specifically: identifier_name.length() function call.

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