Text mode arcade game

[Auradrummer]

Hello masters,

I'm teaching C++ in my technical school, and I wanted to introduce my class in games world with some simple experiences.

We are making a very simple arcade game, where a ship (^) fires some shots (* . ! A) and so on.

We made it with simple functions, and it worked, but cannot fire more than a projectile simultaneously. So, I decided to buid a class.

But, the main problem is that I have to create one shot when I press the keyboard (and this worked), but it have to keep moving even after I release it. And, when I press again, I want to have another shot created (and moving). How to do this?

If helps to understand, follow the class:

class cannon
{
protected:
    typedef struct fire
    {
        char bullet;
        int x;
        int y;
    };

    void setArms(void)
    {
        arms[0].bullet='*';
        arms[1].bullet='!';
    }

public:
    fire arms[2];

    void shoot(int i)
    {
        clock_t runTime;
        runTime = clock();
        gotoxy(arms[i].x,(int)(arms[i].y-runTime/30));
        printf("%c", arms[i].bullet);
        gotoxy(arms[i].x,(int)(arms[i].y-runTime/30-1));
        printf(" ");
    };

    cannon(int x,int y, int i)
    {
        setArms();
        arms[i].x = x;
        arms[i].y = y;
        shoot(i);
    };
};