I want to store a description inside of a map tile structure array and display it on the screen.

so i create this structure type:

struct tile
{
const char *desc;
bool walkable;
char img;
int colorR,colorG,colorB;
unsigned int sapling, tree, rock;
} floor, rock, rocksoil, grass, wall;

define it with:

floor.desc="Stone floor.";
floor.walkable=1;
floor.img=46;
floor.colorR = 100;
floor.colorG = 200;
floor.colorB = 100;

move a little '@' left and right along a single horizontal line

if (key[KEY_4_PAD]&& player.x>0){
player.x-=8;
clear_bitmap(screen);
}

if (key[KEY_6_PAD]&& player.x<472){
player.x+=8;
clear_bitmap(screen);
}

and everything falls apart when i add the line

textprintf_ex(screen, font, 0, 8, makecol(map[player.x].colorR, map[player.x].colorG, map[player.x].colorB), -1, "%s", map[player.x].desc);

Is player.x within the parameters of map?
Meaning if map is defined as map[ n ] then player.x should be from 0 to n-1

Is desc defined of map[ player.x ].desc?

what is desc? what type of variable is it. You said string. Is it a C string or a C++ string?

std::string desc or
char desc[] or
char *desc or
...

Without seeing more code, that's all I say about that.

struct Player
{
char img;
int colorR, colorG, colorB;
int x;
} player;

player.img=64;
player.colorR=140;
player.colorG=140;
player.colorB=140;
player.x=0;

tile map[80];
for(x=0;x<79;x++)
{


i=rand()%8+1;
if(i==1)
map[x]=grass;
else

map[x]=rocksoil;


}

Now I see that map is of tile

and tile is of
char *desc

Is player.x defined before you use it?

And when is each tile in map defined?

player x is defined and set to 0 before it is referenced

this is the main screen drawing loop

for(x=0;x<80;x++)
{
/* multiply by 8 to allow for 8 pixels per character */
xa=x*8;
if (xa == player.x)
{
textprintf_ex(screen, font, xa, 0, makecol(0, 0, 0),-1, "%c", 32);
}
else {

textprintf_ex(screen, font, xa, 0, makecol(map[x].colorR, map[x].colorG, map[x].colorB),-1, "%c", map[x].img);
}

textprintf_ex(screen, font, 0, 8, makecol(map[player.x].colorR, map[player.x].colorG, map[player.x].colorB), -1, "%s", map[player.x].desc);
textprintf_ex(screen, font, 0, 16, makecol(player.colorR, player.colorG, player.colorB), -1, "%d ", player.x/8 );


textprintf_ex(screen, font, player.x, 0, makecol(player.colorR, player.colorG,player.colorB),-1, "%c", player.img);
}

Care to explain what you mean by 'falls apart'?

Do this and tell me what happens

if ( map[player.x].desc )
}
    textprintf_ex(screen, font, 0, 8, makecol(map[player.x].colorR, map[player.x].colorG, map[player.x].colorB), -1, "%s", map[player.x].desc);
{
else
{
    textout_ex(screen, font, "null", 0, 8, makecol(map[player.x].colorR, map[player.x].colorG, map[player.x].colorB), -1 );
}

And I should have said it earlier, but use 'code' brackets when displaying code on this website.

[code]
[/code]

sure, it compiles, and runs

i can iterate the character and it will display the string, however the string doesnt coorelate to the tile the character is standing on

the pointer appears to iterate beyond the array, as it will display strings of desc then it starts to display random symbols then the app freezes

//same thing happens when i replace my map[].desc with the given conditional display

EDIT

I know that you can put structure declarations inside the function, but !!!NO!!!

map[ x ] = grass;

What is that?

How about

map[ x ].walkable = grass.walkable;
map[ x ].img = grass.img;
map[ x ].colorR = grass.colorR;
map[ x ].colorG = grass.colorG;
map[ x ].colorB = grass.colorB;
map[ x ].desc = grass.desc;

Or you could do

tile *map[ 80 ];

map[ x ] = &grass;

if grass is and map[x] are the same data type can't you just assign the values of grass to the array node x?

1) Edit your posts to use code tags. They're nigh unreadable without indentation.

2)

There's your problem.

And in case you don't know what gnolam means, that line should be:

strcpy(floor.desc, "Stone floor");