运行如下代码会输出（ ）。
struct Point { int x, y;}; struct Rectangle { Point topLeft; Point bottomRight;}; int main() { Rectangle rect = {{10, 10}, {20, 20}}; rect.topLeft.x = 5; Point* p = &rect.bottomRight; p->y = 5; cout << rect.topLeft.x + rect.bottomRight.y; return 0;}