提交时间:2026-03-12 19:21:14
运行 ID: 431806
#include<bits/stdc++.h> 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 || i + j == n - 1) { cout << "+"; } else { cout << "-"; } } cout << endl; } return 0; }