array pointer arithmetic strstr

/* john pfeiffer 2010-06 explaining to myself string character pointer arithmetic */
/*
buffer[32] = HELLO WORLD
buffer[0] = 2293536
buffer[0] = first char is H
charptr = 2293536
*charptr = first char is H

sizeof a char 1
 *(charptr+1) = second char is E
charptr = charptr + sizeof( c );
 *(charptr+1) = third char is L

keywordlocation = strstr( buffer , 'WORLD' ); 
keywordlocation = 2293542
*keywordlocation = W
WORLD
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>



int main(int argc, char* argv[])
{
    int i =0;
    char c;
    char buffer[32];
    char* charptr = NULL;
    char* keywordlocation = NULL;

    strcpy( buffer , "HELLO WORLD" );
    printf("buffer[32] = %s\n" , buffer );

    charptr = buffer;

    printf("buffer[0] = %d\n" ,  buffer ); 
    printf("buffer[0] = first char is %c\n" , buffer[0] );

    printf("charptr = %d\n" ,  charptr ); 
    /* dereference the pointer to see the letter stored at that address*/
    printf("*charptr = first char is %c\n" ,  *charptr );

    printf("\nsizeof a char %d\n" , sizeof( c ) );
    printf(" *(charptr+1) = second char is %c\n" ,  *(charptr+1) ); 
    printf("charptr = charptr + sizeof( c );\n" ); 
    charptr = charptr + sizeof( c );
    printf(" *(charptr+1) = third char is %c\n" ,  *(charptr+1) );

    printf("\nkeywordlocation = strstr( buffer , 'WORLD' ); \n" ); 
    keywordlocation = strstr( buffer , "WORLD" );
    printf("keywordlocation = %d\n" , keywordlocation );
    printf("*keywordlocation = %c\n" , *keywordlocation );

    /* print the length of keyword chars by char pointer arithmetic */
    for( i = 0 ; i < strlen( "WORLD" ) ; i++ )
    {
        printf("%c" , *keywordlocation );
        keywordlocation = keywordlocation + sizeof( c ) ;

    }


    return 0;
}/*end of main*/