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


    return 0;
}