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Thread: Simple Spaceship Shooting Game

  1. #1
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    Default Simple Spaceship Shooting Game

    Alright, this is for a programming project which consists of the classes: Game, EnemyShip, PlayerShip and Guns.

    For some reason, I cannot update the enemy's life and the gun's life.

    I have passed the enemy as a parameter from the game class, player class and then to the gun class.

    Here is a part of my code...

    GAME CLASS
    case 'f':
    'F':
    player.fire(enemy1)
    player.fire(enemy2)
    player.fire(enemy3)

    ------
    PLAYERSHIP CLASS

    public void fire(EnemyShip enemy)
    {
    gun1.fire(enemy);
    gun2.fire(enemy);
    }
    -------
    GUN CLASS
    public void fire(EnemyShip enemy) // the gun attemps to fire at the enemy ship
    {
    if (x == enemy.getPosition())
    {
    enemy.updateLife(getPower());
    if (enemy.isDestroyed())
    updatePoints(0);
    }
    }
    ------
    ENEMY CLASS
    public boolean isDestroyed()
    {
    if (life == 0)
    return true;
    else
    return false;
    }
     
    public void updateLife(int damagetaken) // returns the remaining life (damagetaken = gun's powerlevel)
    {
    life = life - damagetaken;
    }

    Thanks very much for your help!
    Last edited by bj12marion; April 20th, 2012 at 07:24 AM. Reason: minor errors in code


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Simple Spaceship Shooting Game

    I cannot update the enemy's life and the gun's life.
    Please explain. Are you having problems writing the code or is the code you have written not doing what you want?
    Where is "life" defined and how is its value updated?
    Try debugging the code by adding println statements to print out the value of life every time it is changed and used. The print outs will show you what the computer is doing.
    If you don't understand my answer, don't ignore it, ask a question.

  3. The Following User Says Thank You to Norm For This Useful Post:

    bj12marion (April 20th, 2012)

  4. #3
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    Default Re: Simple Spaceship Shooting Game

    Sorry about that. I am having problems about the code not doing as I wanted it to do.

    And I have life defined in the enemy class...

    and this is how I update it:

    public void updateLife(int damagetaken) // returns the remaining life (damagetaken = gun's powerlevel)
    {
    life = life - damagetaken;
    }

    And thanks. I'll try the debugging and see what actually happens...

    ---

    (EDIT)
    I tried debugging it, and I've realised that the life has not been updated. Gosh. I'll see what I can do for now.

    ---

    (EDIT AGAIN)
    Thanks very much! It's all good now. Even just debugging helped a lot! (So much for being a beginner
    Last edited by bj12marion; April 20th, 2012 at 11:04 AM. Reason: more explanation

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