找规律,代码如下
#include <iostream>
using namespace std;
int main() {
int n;
while (cin >> n) {
for (int i = 1; i <= n; i++) {
for (int j = 1; j <= 2*n-1; j++)
if (j >= n-i+1 && j <= n+i-1) cout << '*';
else cout << ' ';
cout << endl;
}
}
return 0;
}