A Shooting Array

[TheLastFall]

I browsed the posts and I could not find any that could help me. I'm trying to make a game similar to the famous Space Invaders (Which is still in my opinion the best game in the world). I wrote down my code during English class and I know it doesn't work now but I can't really seem to find out whats wrong with it. I know that there are the procedure codes but I'm not quite sure how to use them so I tried an array, which to me looks like it'd work. I've tried and and I've recived several errors.
This is what I have:

code:

var bulletX : array 1 .. 10 of int               %% So only ten bullets will appear on screen var bulletY : array 1 .. 10 of int               %% So only ten bullets will appear on screen var bulX, bulY, bRad : int                        %% The starting location of the shot bulX := maxx div 2 The 'x' axis of the position bulY := 34                                              %% The 'y' axis of the position bRad := 1                                               %% Size of the oval const bSPD := 10                                    %% The speed the bullet is going if chars (UP_ARROW_KEY) then       for n : 1 .. 10                                     %% Changing the array + 1           bulletX(n) := bulX                 %% Making that specific array start at the bulX position           bulletY(n) := bulY                  %% Making that specific array start at the bulX position       end for drawfilloval (bulletX(n), bulletY(n),bRad,bRad, 255) bulletY(n) += bSPD                                  %% How fast the bullet will move up elsif (bulletY(n) => maxy or bulletY(n) =< 0) then %% So the array will decrease if the bullet goes off screen       for decreasing n : 1 .. 10           bulletX(n)           bulletY(n)       end for end if

I do know some of the errors but I have no idea how to fix them. Is there any way other then using procedures? Your help would be very much appreciated. I've been trying to create a code that will shoot for a while and everything I've tried failed. I've been hitting my head off the wall on this.

[Cervantes]

You should be using flexible arrays for this. Why? Because we don't know how many bullets will have been fired at any given time.

Now, your code is setting every bullet to the starting position when the up arrow is pressed. Instead, it should create a new bullet and set it to that, and leave the others alone. Each bullet should have its own x, y, vx, and vy (velocities) values. To do this, you should know about records. Create an array of a record, rather than running 4 arrays in parallel.

Be sure to check out the Turing Walkthrough to get links to more tutorials that you might need.

[TheLastFall]

Well thanks for the help, I'm just trying to figure out a collision now. Really confusing.