杨辉三角

class Yanghui

{  

     public static void main(string[] args)

    { 

    int[][] yanghui=new int [10][];

    for(int i=0;i<yanghui.length;i++)

       {

           yanghui[i]=new int[i+1];

           yanghui[i][0]=1;

           yanghui[i][i]=1;

       }

   for(int i=2;i<yanghui.length;i++){

   for(int j=1;j<yanghui[i].length-1;j++){yanghui[i][j]=yanghui[i-1] [j-1]+yanghui[i-1][j];   }

  }

   for(int=0;i<yanghui.length;i++)

   {

    for(int j=0;j<yanghui[i].length;j++){System.out.print(yanghui[i][j]+"\t");}

    System.out.printIn();

    }

}