知识点：

循环控制：循环输出图形 

#include <iostream>
using namespace std;

int main() {
    int n;

    while (cin >> n) {
        for (int i = n; i >= 1; i--) {
            for (int k = 1; k <= n - i; k++) {
                cout << " ";
            }
            for (int j = i; j >= 1; j--) {
                cout << "* ";
            }

            cout << endl;
        }
    }


    return 0;
}