Well, to do this well you will need some knowledge of arrays, if statements, and loops (among other things). If you don't understand these, there are very well written tutorials on this very website(
) to guide you. Here is a pseudo-example of what I would do.
| code: |
var Apples : array 1 .. 20 /* So we have twenty apples on screen. I would make these a record with x and y as fields to represent the apple's coordinate on screen */ var SnakeX, SnakeY, SnakeSize : int /* If the screen is a coordinate plane (QI) then the snake can be represented at point (x,y) and can be a circle/box whatever that is SnakeSize big */ loop if Player presses up arrow then SnakeY increases by one (move the snake towards the top of the screen) elsif Player presses down arrow then SnakeY decreases by one elsif Player presses left arrow then SnakeX decreases by one (move the snake towards the left side of the screen) elsif Player presses right arrow then SnakeX increases by one end if /*Now that the snake has moved, go through the list of apples and check if the snake has collided with any of them. Again, see the collision tutorial if you don't know how to do this. If the snake has collided with an apple, increase the snake's size variable by an arbitrary amount, then regenerate the apple somewhere else*/ for i : 1 .. upper (Apples) if collision then regenerate apple somewhere else SnakeSize += 1 end if end for DrawSnake DrawApples end loop |
Again, this is not actual code. This is supposed to give you an idea where to start. Look up the appropriate tutorials, read through them and understand them, and this should be a piece of cake.
Good luck,
Expirant