java - Need Help Programming Battleship Location Selector/Checker -

-

i trying develop 1-sided battleship game , have set up. need incorporate array holds @ time, 5, ships objects. class created each ship called ships.java. earlier having problems initializing array has been settled.

the problem arises when try pull in length of ship (2, 3, 4 or 5) index in array. i'm not sure how conceptually go placing ships.

i feel i've tried every combination of do-whiles, loops , if statements. tried switch-case.

the goal have computer select positions 5 ships , set each cell in grid (rowsxcols) equal nc_ship (not clicked, plus ship). problem making check positions of cells adjacent random location on grid. has check if ship in question fit (pulling ships[i].getshiplength()).

here code have far:

int shipsplaced = 0;      (int = 0; < ships.length; i++)     {         boolean shipplaced = false;                  {             int randomrow = (int)(math.random()*rows);             int randomcol = (int)(math.random()*cols);             int p = 0;              if (randomrow - ships[p].getshiplength() >= 0 && gameboard[(randomrow - p)][randomcol] == nc_empty)             {                 (int x = 0; x < ships[x].getshiplength(); x++)                 {                     gameboard[(randomrow - x)][randomcol] = nc_ship;                     shipsplaced = shipsplaced + 1;                     if (x == ships[x].getshiplength())                     {                         shipplaced = true;                         p = p + 1;                     }                 }             }         }while (shipplaced == false);      }

everything has been initialized , set if it's not visible here. problem math/logic used place ships in 'random' locations.

first of all: ships go horizontal, should randomize placement direction of ship.

there 2 ways face problem:

  1. first fit initial pos if ship fits.
  2. first list available positions, randomize number equal list length

1 - make recursive random initial position (x,y) (which should free, if not re-throw position). in recursive "lookforpos" method, make randomplacementdirection, , that, flag (eg ishorizontal). if doesn't fit (length start final position overflows size of matrix), re-throw. cover positions (position, position+1, position+2, ..., position+n) 'n' length of ship , position x,y pair , +1 affects 1 of cardinals (depending if ishorizontal or not) if of them occupied re-throw. you'll have need.

2 - make list of positions fits (a 'for' structure), both horizontal , vertical, randomize length of list.


Comments

Post a Comment

Popular posts from this blog

php - What is the difference between $_SERVER['PATH_INFO'] and $_SERVER['ORIG_PATH_INFO']? -

-
what’s difference between $_server['path_info'] , $_server['orig_path_info'] ? how use them? when run print_r($_server) , path_info , orig_path_info not present in array. why not? how can enable them? i have read php manual on them, still don’t understand them. the path_info variable present if invoke php script this: http://www.example.com/phpinfo.php/hello_there it's /hello_there part after .php script. if don't invoke url that, there won't $_server["path_info"] environment variable. the porig_ prefix uncommon. path_info standard cgi-environment variable, , should never prefixed. did read that? (there issues around php3/php4 if invoked php interpreter via cgi-bin/ - hardly has such setups today.) for reference: http://www.ietf.org/rfc/rfc3875
Read more

fortran - Function return type mismatch -

-
i'm attempting recode old c++ program in fortran make use of lapack (i'm aware c++ have lapack++, i'm having lot of trouble installing it, gave up). i didn't have problems compilation, when had variables declared real . when started coding section of program required lapack, found parameters passed dsyev need double precision . tried change double precision (including changing hard coded numbers double precision counterparts, i.e. 0.0 -> 0.0d0) when try compile, following error of functions , subroutines i've written: error: return type mismatch of function <function> @ (1) (real(4)/real(8)) i'm not sure coming from, in program has been changed double precision. for example, i've declared following: double precision :: alpha(3),d(3),zeta1,zeta2 double precision :: a1(3),a2(3),d1(3),d2(3) double precision :: pi pi = 3.14159265359d0 alpha = (/0.109818d0, 0.405771d0, 2.22766d0/) d = (/0.444635d0, 0.535328d0, 0.154329d0 /) 10 i=1,3 ...
Read more

queue - mq_receive: message too long -

-
i implementing communication between 2 processes using queue. problem when call function mq_receive, error: message long. i have done following: struct mq_attr attr; long size = attr.mq_msgsize; .... // initializing queue "/gateway" int rc = mq_receive(gateway, buffer, size, &prio); if print size value, size=1, while when print same size program (got same mechanism), not long integer ( -1217186280 )... how can solve error?....so while size = 1, believe it's right "message long" why 1? p.s. have tried put : int rc = mq_receive(gateway, buffer, sizeof(buffer), &prio); but no result. it seems need read docs more carefully. when call mq_receive should pass size of destination buffer. this size must greater mq_msgsize attribute of queue . in addition, seems have error in queue attributes initialisation makes proper mq_receive call impossible. here standard message queue session: fill mq_attr struct ( doc ): struct mq_a...
Read more