c3_20.java

牛顿 迭代法

public class c3_20
{public static void main(String[] args)
   {int j;
    int a=0;
    int b=5;
    for(int i=1;i<=5;i++)
       {j=1;
        while(j<=a)
        {System.out.print("  ");
         j++;
         }
        for(j=1;j<=b;j++)
           System.out.print("* ");
           System.out.println(" ");
        a++;
        b--;
        }
    }
}