用JAVA程序实现杨辉三角形程序

public class 杨辉三角 {
    public static void main(String args[])
    {        int x=10;        int num[][] = new int[x][x];
        for(int m=0;m<x;m++)
       
            for(int n=0;n<=m;n++)
            {
                if(n==0||m==n)
                {
                    num[m][n]=1;
                }
                else
                    num[m][n]=num[m-1][n-1]+num[m-1][n];
            }
       
        for(int i=0;i<x;i++)
        {
            for(int l=i;l<x;l++)
            {
                System.out.print(" ");
            }
            for(int j=x-i;j<=x;j++)
                System.out.print(num[i][x-j]+" ")
            }
            System.out.println();
        }
    }