debugging - C++ Function not working as expected -

so know broad topic, i'm not sure how describe , i'm not sure bug is. i'm making game in console window, roguelike-rpg, (i haven't done random dungeon yet, i've done in other languages.) , i'm having problems dealing walls.

i have function called placemeeting(real x, real y) use check collisions, appears returning bad values , couldn't tell why. have couple of macros defined: #define , && , #define real double.

here function:

bool globalclass::placemeeting(real x, real y) {     //the return value -- false until proven otherwise     bool collision = false;      //loop through walls check collision     for(int = 0; < wallcount; i++)     {         //if there collision, 'say'         if (x == wallx[ ] , y == wally[ ])         {             //set 'collision' true             collision = true;         }     }      return collision; } 

but strange catch doesn't work when displaying screen. player collides them same though there not displayed. stranger, first wall being displayed. here walls defined:

int wallcount;  //array of walls real wallx[ 1 ]; real wally[ 1 ]; 

and

wallcount  = 1; //basic wall stuff; placeholder wallx[ 0 ] = 10; wally[ 0 ] = 10; 

so have function used render screen (in console window of course.) , looks this:

for (int y = oglobal.viewy; y < oglobal.viewy + oglobal.viewheight; y++) {     //the inner 'x' loop of view     for(int x = oglobal.viewx; x < oglobal.viewx + oglobal.viewwidth; x++)     {         //call function check spot , print returns         screen += oglobal.checkspot(x, y);     } } 

that's not whole function, actual screen refreshing. after 'screen' printed screen, reduce buffer time. , of course, checkspot:

string globalclass::checkspot(real x, real y) {     string spriteatspot;      //first check player     if (x == oplayer.x , y == oplayer.y)     {         spriteatspot = oplayer.sprite;     }     else if (placemeeting(x, y)) //its teh wall suckas     {         spriteatspot = wall_sprite;     }     else //nothing here, return space     {         spriteatspot = empty_sprite;     }      //return sprite     return spriteatspot; } 

i know it's lot of code, don't know screwed up.

i appreciate help!

p.s. here image understand http://i.imgur.com/8xnahit.png

i'm not sure if i'm missing something, since rogue-like games tile-based, necessary make x , y values doubles? remember being told doubles finicky compare, since if assume should equal, off, causing comparison return false when you'd think return true.