SANITY_CHECK/CRANE_ARM_POINTERS

//:==========================================================://
//:                                                          ://
//:  www.twitch.com/KanjiCoder                               ://
//:                                                          ://
//:  #_MAKE_SURE_I_UNDERSTAND_POINTERS_#                     ://
//:                                                          ://
//:  Every once and a while I do some weird stuff with       ://
//:  pointers and I end up having the thought...             ://
//:                                                          ://
//:  "I thought I knew pointers. But maybe I don't."         ://
//:                                                          ://
//:  This code was written after one of those moments.       ://
//:  To hopefully solidify my mental model of pointers.      ://
//:                                                          ://
//:  Maybe the "elaborative encoding" of thinking of         ://
//:  arrays and the values they store as a big crane         ://
//:  arm that selects shoes (values) by moving to            ://
//:  different locations (boxes) will help someone           ://
//:  besides myself.                                         ://
//:                                                          ://
//:==========================================================://

    #include <stdint.h>
    #include <stdio.h>

    #define VOD void
    #define I32 int32_t
    #define P_F printf

    //:------------------------------------------------------://
    //:                                                      ://
    //:                                                      ://
    //:                                                      ://
    //:  ==================================================  ://
    //:  Crane Arm Track //////////////////////////////////  ://
    //:  ==================================================  ://
    //:                  |                     |             ://
    //:             arr[ 1 ]           &( arr[ 3 ] )         ://
    //:                  |                     |             ://
    //:             +----+----+           +----+----+        ://
    //:             |         |           |         |        ://
    //:             |         |           V         V        ://
    //:  [    0    ]|    1    |[    2    ][    3    ]  <--Boxes
    //:             V         V                              ://
    //:  [ B B B B ][ B B B B ][ B B B B ][ B B B B ]  <--Shoes
    //:  ^         ^                                         ://
    //:  |         |                                         ://
    //:  +----+----+                                         ://
    //:       |                                              ://
    //:  32Bit_Value                                         ://
    //:  (   Shoe  )                                         ://
    //:                                                      ://
    //:------------------------------------------------------://

    VOD set_dex(

        I32  *crane_arm_airspace_position
    ){

        //:  "*" pluges crane arm down       Inserts Value   ://
        //:               |                     |            ://
        //: +-------------+--------------+   +--+--+         ://
        //: |                            |   |     |         ://
        //: V                            V   V     V         ://
            (*crane_arm_airspace_position) = ( 666 );
    }


    I32 main( VOD ){

        I32  eve , odd , dex ;
        I32  arr[ 10 ]={ 0 };

        for( dex = 0 ; dex <= 9 ; dex++ ){

            eve =( 0 == ( dex % 2 ) );
            odd =( 1 == ( dex % 2 ) );

            if( eve ){             arr[ dex ]=( 333 );  };
            if( odd ){ set_dex( &( arr[ dex ] ) );      };
        };;

        for( dex = 0 ; dex <= 9 ; dex ++ ){

            P_F( "(%d):(%d)\n" , dex , arr[ dex ] );

            /** **************************************** ***
            *** expected output :                        ***
            ***                                          ***
            ***     (0):(333)                            ***
            ***     (1):(666)                            ***
            ***     (2):(333)                            ***
            ***     (3):(666)                            ***
            ***     (4):(333)                            ***
            ***     (5):(666)                            ***
            ***     (6):(333)                            ***
            ***     (7):(666)                            ***
            ***     (8):(333)                            ***
            ***     (9):(666)                            ***
            ***                                          ***
            *** **************************************** **/
        };;
    }