referening typedef enum then assigning it to another var to reference it?

**~~userxbw~~** · 09-01-2017

I hope I got all of that terminology correct and in the correct order.

I've only found how to set up an typedef enum but nothing even close to how to manipulate it in the fashion I want to.

What I got setup to where I am now only getting this warning, but I believe what I have is still not workable. ( because seg faults say a lot)

warning: initialization makes pointer from integer without a cast [-Wint-conversion]|

The basic parts are this:

Code:

typedef enum Tile_Image
{
    TILE, TILEH, TILEV, TILEHV, RTILE, RTILEH, RTILEV, RTILEHV, SPACE_TILE
}Tile_Image;

// the elements would be assigned 0 thru 8 by default.
//assigning one of the elements numbers to a char to reference it later.

typedef struct { 
unsigned char mode;
 }Some_Items;

Tile_Image ti;
Some_items si;

int *i = (rand() % 8);
si.mode = ti[i];

Basically I am trying to get it to randomize 0 ... 8 then whatever element is a match for that random number to be then assigned to the mode in order to reference from it when passed to the function that reads what value si.mode is.

Code:

switch (si.mode)
{
case TILE:
    do_something;
    break;
case TILEH:
   do_something;
   break;
.....
default:
  break;
}

I am just trying to assign the element number to mode so I can reference it again on the other end to set it in motion.

my logic is because when calling to see what element mode has is.

printf("%d\n", (int)mode); which prints a number or integer and not the actual name of the element.

I hope that makes sense to someone in here.

**algorism** · 09-01-2017

Why is i a pointer? It should just be an integer.

Why are you treating an enum as an array? An enum is not an array. An enum just provides a bunch of named constants. That's all.

All you need to do to achieve your goal is:

Code:

typedef enum {
    TILE,  TILEH,  TILEV,  TILEHV,
    RTILE, RTILEH, RTILEV, RTILEHV,
    SPACE_TILE,
    NUM_TILES  // this symbol will equal the number of previous symbols
} Tile_Image;

typedef struct { 
  Tile_Image mode;
} Some_Items;

Some_items si;

si.mode = rand() % NUM_TILES;

**~~userxbw~~** · 09-01-2017

all good questions, and I did already do what you wrote,
or, I already did what you have written.

Code:

    img.which_image_type = (rand() % 4);
    
    switch (img.which_image_type)
    {
        case 0:
            break;
        case 1:
            printf("standard\n");
            img.mode = (rand() % 3);
            set_image_type();
            break;
        case 2:
            printf("tile\n");
            img.mode = (rand() % 8);
            set_image_type();
            break;
        case 3:
            printf("flip\n");
            img.mode = (rand() % 4);
            set_image_type();
            break;
        case 4:
            break;
        default:
            break;


    }

then wondered them very same questions you posted myself before I read this post, but figured I'd leave the Q up just in case their was a different way of doing this.

the pointer thing was because before posting it was giving me this pointer error so I made the int a pointer that got rid of that message and gave me a new one.

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