int triangle(int lines)
{
	int linecount=0;


	for(int a=0;a<=lines+lines-1;a++)
	{
		linecount++;
		
		if(linecount>lines)
		{
			for(int b=0;b<=linecount-lines;b++)
			{
				cout<<" ";
			}
		}
		else
		{
			for(int b=0;b<=lines-linecount;b++)
			{
				cout<<" ";
			}
		}

	
		if(linecount>lines)
		{
			for(int c=linecount;c<lines+lines;c++)
			{
				
				cout<<"* ";
			}
			cout<<endl;
		}
		else
		{
			for(int c=0;c<linecount;c++)
			{
				
				cout<<"* ";
			}
			cout<<endl;
		}
	}
}