杨辉三角

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int [][] Array_int = new int[10][];
            //遍历行数
            for (int i = 0; i < Array_int.Length; i++ )
            {
                //定义二维数组的列数
                Array_int[i] = new int[i+1];
                //遍历列数
                for (int j = 0; j < Array_int[i].Length;j++ )
                {
                    //数组的前两行
                    if(i <= 1)
                    {
                        Array_int[i][j] = 1;
                        continue;
                    }
                    else
                    {
                        //行首或行尾
                        if(j == 0 || j == Array_int[i].Length - 1)
                        {
                            Array_int[i][j] = 1;
                            continue;
                        }
                        else
                        {
                            Array_int[i][j] = Array_int[i-1][j-1] + Array_int[i - 1][j];
                        }
                    }
                }
            }
            //打印
            for (int i = 0; i < Array_int.Length; i++)
            {
                for (int j = 0; j < Array_int[i].Length; j++)
                {
                    Console.Write("{0}\t", Array_int[i][j]);
                }
                Console.WriteLine();
            }
            Console.ReadLine();
        }
    }
}