yanghui.java

介绍了java的一些应用

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package 杨辉三角的打印;
import java.io.*;
public class Yanghui{
	public static void main(String args[])
	{
            int n,i,j;
            n=0;
            System.out.println("Please Input How Many Lines to Print:");
            try{BufferedReader br=
                    new BufferedReader (new InputStreamReader(System.in));
            n=Integer.parseInt(br.readLine());
            }catch(IOException e){}
            System.out.println("There Are "+n+" Lines:");
            int[][] yangNum;
            yangNum=new int[n+1][n+1];
		yangNum[1][1]=1;
		yangNum[2][1]=1;
		yangNum[2][2]=1;
		for(i=3;i<=n;i++)
		{
			yangNum[i][1]=1;
			for(j=2;j<i;j++)
			{
				yangNum[i][j]=yangNum[i-1][j]+yangNum[i-1][j-1];
			}
			yangNum[i][i]=1;
		}
		for(i=1;i<=n;i++)
		{
			for(j=1;j<=i;j++)
			  System.out.print(yangNum[i][j]+"\t");
			 System.out.println();
		}
		
	}
}