日期:2014-05-17 浏览次数:20850 次
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication1 { static class Helper { //m!/(n!*(m-n)!) public static int C(int m, int n) { return facEx(n + 1, m) / facEx(2, m - n); } private static int facEx(int from, int to) { int result = 1; for (int i = from; i <= to; i++) { result *= i; } return result; } } class Program { static void Main(string[] args) { int n = 8; int[][] result = new int[n + 1][]; for (int i = 0; i < n + 1; i++) { result[i] = new int[i + 1]; for (int j = 0; j <= i; j++) { result[i][j] = Helper.C(i, j); } } foreach (int[] item in result) { Console.WriteLine(string.Join(" ", item.Select(x => x.ToString().PadLeft(3, ' ')).ToArray())); } } } }