GESP二级 - C++ 蝴蝶结图案生成算法

#include using namespace std;

int main() { int n; cin >> n; if (n % 2 == 0) { cout << "请输入一个奇数！" << endl; return 0; } int mid = n / 2 + 1; for (int i = 1; i <= n; i++) { for (int j = 1; j <= n; j++) { if (i <= mid) { if (j <= i || j > n - i + 1) { cout << ""; } else { cout << " "; } } else { if (j <= n - i + 1 || j > i) { cout << ""; } else { cout << " "; } } } cout << endl; } return 0; }