简单，但很玩心态，老子试了十几次！

#include<iostream>
using namespace std;
int main(){
cout << " * " << endl;
cout << " * * " << endl;
cout << " * * " << endl;
cout << "* *" << endl;
cout << " * * " << endl;
cout << " * * " << endl;
cout << " * " << endl;
return 0;
}