import java.util.Scanner;
public class Demo2 extends Demo1
{
public void fangfa()
{
System.out.println("请输入想打印的行数");
Scanner sc = new Scanner(System.in);
int h = sc.nextInt();
//倒三角
for(int i=1;i<=h;i++)
{
for(int j=1;j<=i-1;j++)
{
System.out.print(" ");
}
for(int k=1;k<=2*h-2*i+1;k++)
{
System.out.print("*");
}
System.out.println();
}
}
}