C++ :

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