哪位大佬知道这道题我错在哪？？？

#include <bits/stdc++.h> using namespace std; int main() { int n; cin >> n; if (n % 2 != 0) { for (int i = 1; i <= n + 2; i++) { for (int j = 1; j <= n + 2; j++) { cout << ""; } cout << endl; } } else { for (int i = 1; i <= n + 1; i++) { for (int j = 1; j <= n + 1; j++) { cout << ""; } cout << endl; } } }