play_with_pointers_v2.c

/*

    play_with_pointers_v2.c

    Useful link for ASCII table
    http://www.asciitable.com/


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/


#include <stdio.h>

int main()
{
    char *str1 = "ABCDEFGHIJKLMNOPQRSTUVWXZYabcdefghijklmnopqrstuvwxzy";
    char *str = str1 + 26;

    printf("\n str1 = %s \n", str1 );
    printf("\n                            str = %s \n", str );
    printf("\n ---------------------- \n");

    printf("\n *((str--)   )  )   = %c \n", *((str--    )  )  ); // a
    str++;  // because we had str--
    printf("\n *((str-- + 2)  )   = %c \n", *((str-- + 2)  )  ); // c
    str++;  // because we had str--
    printf("\n *((str-- + 2)+1)   = %c \n", *((str-- + 2)+1)  ); // d
    str++;  // because we had str--
    printf("\n *((str-- + 2)+1)-3 = %c \n", *((str-- + 2)+1)-3); // a because d-3=a in ASCII table
    str++;  // because we had str--

    printf("\n ---------------------- \n");

    printf("\n *(--str  )    = %c \n", *(--str  )    ); // Y
    str++;  // because we had str--
    printf("\n *(--str+3)    = %c \n", *(--str+3)    ); // c
    str++;  // because we had str--
    printf("\n *(--str+3)+32 = %c \n", *(--str+3)+32 ); // â something in memory right from c, c+32 = ???
    str++;  // because we had str--

    printf("\n ---------------------- \n");

    printf("\n *(++str  )   = %c \n", *(++str  )   );  // b
    --str;  // because we had ++str
    printf("\n *(++str+2)   = %c \n", *(++str+2)   );  // d
    --str;  // because we had ++str
    printf("\n *(++str+2)+4 = %c \n", *(++str+2)+4 );  // h because d+4=h in ASCII table
    --str;  // because we had ++str

    printf("\n ---------------------- \n");


    return 0;
}