/*
 *  ======================================================================
 *  prog_pointers3.c --  illustrate pointers and arrays at work and their
 *                       relationships.
 *  ======================================================================
 *  Copyright (C) 1993-96 by Mark Austin and David Mazzoni.
 *                                                                     
 *  This software is provided "as is" without express or implied warranty.
 *  Permission is granted to use this software on any computer system,
 *  and to redistribute it freely, subject to the following restrictions:
 * 
 *  1. The authors are not responsible for the consequences of use of
 *     this software, even if they arise from defects in the software.
 *  2. The origin of this software must not be misrepresented, either
 *     by explicit claim or by omission.
 *  3. Altered versions must be plainly marked as such, and must not
 *     be misrepresented as being the original software.
 *  4. This notice is to remain intact.
 *
 *  Written By : D. Mazzoni and M. Austin                    January 1994
 *  ======================================================================
 */

#include <stdio.h>   /* for printf() prototype */
#include <string.h>  /* for strlen()           */

int main( void ) {
static char caArray[] = "character array";    
char* cpChar = caArray;                    /* pointer into character array */
int iCnt;                                  /* counter for indexing         */

  /* [a] : Show some things like size of each, values, etc. */

     printf( "The value of \"caArray\" is %x\n", caArray );
     printf( "The value of \"cpChar\"  is %x\n", cpChar );
     printf( "The size of \"caArray\"  is %d\n", sizeof( caArray ) );
     printf( "The size of \"cpChar\"   is %x\n", sizeof( cpChar ) );
     printf( "The address(&) of \"caArray\" is %x\n", &caArray );
     printf( "The address(&) of \"cpChar\"  is %x\n", &cpChar );

  /* [b] : Manipulate character array */

     printf("\n");
     for( iCnt = 0; iCnt < strlen(caArray); ++iCnt ) {
       printf( "\ncaArray[%d] = %c\tcpChar[%d] = %c\t%d[cpChar] = %c"
               "\t*(cpChar + %d) = %c",
               iCnt, caArray[iCnt], iCnt, cpChar[iCnt],
               iCnt, iCnt[cpChar], iCnt, *(cpChar+iCnt) );
     }

  /* [c] : Now use the pointer as the variable */

     printf("\n\nUsing pointer incrementing for caArray = ");
     for( iCnt = 0; iCnt < strlen( caArray ); ++iCnt )
          putchar( *cpChar++ );
     puts(" ");
}