小红的矩阵构造c++

以下是一个用C++构造小红矩阵的示例代码：

#include <iostream>
#include <vector>

std::vector<std::vector<int>> constructMatrix(int n) {
    std::vector<std::vector<int>> matrix(n, std::vector<int>(n, 0));
    int a = 1, b = 2;
    for (int i = 0; i < n * n; i++) {
        if ((i / n + i % n) % 2 == 0) {
            matrix[i / n][i % n] = a;
            a += 2;
        } else {
            matrix[i / n][i % n] = b;
            b += 2;
        }
    }
    return matrix;
}

int main() {
    int n;
    std::cin >> n;
    std::vector<std::vector<int>> res = constructMatrix(n);
    for (const auto& row : res) {
        for (int x : row) {
            std::cout << x << " ";
        }
        std::cout << std::endl;
    }
    return 0;
}