class Cannonball {
    double x; 
    double y; 
    double vx; 
    double vy;
    final double g = 9.81; 

    double max; 

    Cannonball(double speed, double angle) {
        System.out.println("A cannonball with initial velocity " + speed + "m/s launched at an angle of " + Math.toDegrees(angle) + " degrees."); 
	x = 0; 
	y = 0; 
	vx = Math.cos(angle) * speed; 
	vy = Math.sin(angle) * speed; 
	max = 0; 
    } 
    void move() {
	double deltaT = 0.01; 
	x += vx * deltaT;
	y += vy * deltaT; 
	vy -= g * deltaT;
	if (y > max) { max = y; } 
    }
    void report() {
	System.out.print("Located at: (" + x + ", " + y + ") "); 
        System.out.println(" ... max altitude so far: " + max); 
    }
    double height() {
	return y; 
    } 
}

class Max {
    public static void main(String[] args) {

	Cannonball c = new Cannonball(10, Math.PI / 4);

	for (int i = 0; i < 10 * 100; i++) { // flying 10 seconds 

	    c.move(); 
	    System.out.print( i / 100.0 + " seconds into the flight: "); 
            c.report(); 

	    if (c.height() < 0) {
		System.out.println("The cannonball landed!"); 
		break; 
	    } 

	}

    }
}