只要你会cout和endl或"\n"就能做满分：

#include <bits/stdc++.h>
using namespace std;
int main()
{
    cout<<"         *"<<endl;
    cout<<" *     *"<<endl;
    cout<<"  *  *"<<endl;
    cout<<"   *"<<endl;
	return 0;
}

注意！！！一定要复制输出的结果，空格不对也会WA！！

有是一道水题

#include <bits/stdc++.h>
using namespace std;
int main()
{
	cout<<endl<<"         *"<<endl<<" *     *"<<endl<<"  *  *"<<endl<<"   *"<<endl;
	return 0;
}