#unittest {
	name: "Struct test.";
	error: NONE;
	result: 1070;
};

class P1 {
    var x;
    var y;
    
    func init (a, b) {
        x = a;
        y = b;
    }
    
    func sum() {
        return x + y;
    }
}

struct P2 {
    var x = 0;
    var y = 0;
    
    func init (a, b) {
        x = a;
        y = b;
    }
    
    func sum() {
        return x + y;
    }
}

func main() {
    var p1 = P1(10, 20);
    var p2 = P2(20, 30);
    
    var obj1 = p1;
    obj1.x = 1000;
    
    var obj2 = p2;
    obj2.x = 1000;
    
    return p1.sum() + p2.sum();
}