C++实现输出指定大小的对角矩阵

```cpp #include <iostream> using namespace std; int main() { int n; cin >> n; for (int i = 0; i < n; ++i) { for (int j = 0; j < n; ++j) { if (i == j) { cout << i + 1; } else { cout << 0; } if (j < n - 1) { cout << " "; } } cout << endl; } return 0; } ``` ######[AI问答 | 155点数解答 | 2026-05-09 19:23:45]