/*  StackExploration.c  (c) Kari Laitinen

    http://www.naturalprogramming.com/

    2013-11-27 File created.
    2013-11-27 Last modification.
*/

#include  <stdio.h>

void  function_xx()
{
   int  array_xx[]  =  { 0x1111, 0x2222 } ;
   int  sum_xx      =  array_xx[ 0 ] + array_xx[ 1 ] ;

   printf( "\n sum_xx is in address %X", &sum_xx ) ;

   int   memory_positions_printed   =  0 ;
   int*  memory_pointer  =  &sum_xx ;

   while ( memory_positions_printed  <  16 )
   {
      printf( "\n Memory address %X contains %X", memory_pointer,
              *memory_pointer ) ;
      memory_pointer ++ ;
      memory_positions_printed  ++ ;
   }
}

void  function_yy()
{
   int  array_yy[]  =  { 0x3333, 0x4444 } ;
   int  sum_yy      =  array_yy[ 0 ] + array_yy[ 1 ] ;

   printf( "\n sum_yy is in address %X", &sum_yy ) ;

   function_xx() ;
}

void  function_zz()
{
   int  array_zz[]  =  { 0x5555, 0x6666 } ;
   int  sum_zz      =  array_zz[ 0 ] + array_zz[ 1 ] ;

   printf( "\n sum_zz is in address %X", &sum_zz ) ;

   function_yy() ;
}

int main()
{
   printf( "\n function_xx starts in address %X"
           "\n function_yy starts in address %X"
           "\n function_zz starts in address %X",
           function_xx, function_yy, function_zz ) ;

   function_zz() ;
}

/*  Here is a possible output generated by this program:

 function_xx starts in address 401290
 function_yy starts in address 4012FE
 function_zz starts in address 401335
 sum_zz is in address 22FF0C
 sum_yy is in address 22FEEC
 sum_xx is in address 22FECC
 Memory address 22FECC contains 3333
 Memory address 22FED0 contains 1111
 Memory address 22FED4 contains 2222
 Memory address 22FED8 contains 22FEF8
 Memory address 22FEDC contains 401333
 Memory address 22FEE0 contains 40303C
 Memory address 22FEE4 contains 22FEEC
 Memory address 22FEE8 contains 22FFC4
 Memory address 22FEEC contains 7777
 Memory address 22FEF0 contains 3333
 Memory address 22FEF4 contains 4444
 Memory address 22FEF8 contains 22FF18
 Memory address 22FEFC contains 40136A
 Memory address 22FF00 contains 403056
 Memory address 22FF04 contains 22FF0C
 Memory address 22FF08 contains 22FFC4

*/