错误:在C++中初始化二维结构变量时需要表达式

#include <iostream>

struct Point {
    int x;
    int y;
};

int main() {
    Point points[3][3] = {
        {{1, 2}, {3, 4}, {5, 6}},
        {{7, 8}, {9, 10}, {11, 12}},
        {{13, 14}, {15, 16}, {17, 18}}
    };

    // 输出二维结构变量的值
    for (int i = 0; i < 3; i++) {
        for (int j = 0; j < 3; j++) {
            std::cout << "Point (" << points[i][j].x << ", " << points[i][j].y << ")" << std::endl;
        }
    }

    return 0;
}