C40-小码争霸赛-4

#include <iostream>

using namespace std;

int main(){
    int n;
    cin >> n;
    //输出三角形 
    for (int i=1; i<=n; i++){
        for (int j=1; j<=n-i; j++) cout << ' ';
        for (int j=1; j<=2*i-1; j++){
            cout << '*';
        }
        cout<< endl;
    }

	//输出树干， 空格 + * 
    for (int i=1; i<=n; i++){
        for (int j=1; j<=(2*n-1)/2; j++) cout << " ";
        cout << "*";
        
		cout << endl;
    }


    return 0;
}