考虑以下代码，输出结果是（ ）。

struct Point {

    int x;

    int y;

};

int main() {

    struct Point p1 = {10, 20};

    struct Point p2 = {30, 40};

    struct Point *ptr = &p1;

    ptr->x = p2.x;

    ptr->y = p2.y;

    printf("%d %d\n", p1.x, p1.y);

    return 0;

}

30 40

30 20

10 20

10 40