打印杨辉三角型

using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace 杨辉三角{public class Program{/// <summary>/// 主函数/// </summary>/// <param name="args"></param>public static void Main( string[] args ){PrintYangHui( 8 );PrintYangHui( 8, 8 );Console.ReadLine();}/// <summary>/// 打印三角形/// </summary>/// <param name="n"></param>/// <returns></returns>public static int[] PrintYangHui( int n ){if ( n == 1 ) return Print( new int[] { 1 } );if ( n == 2 ){PrintYangHui( n - 1 );return Print( new int[] { 1, 1 } );}int[] pR = PrintYangHui( n - 1 );int[] R = new int[n];R[0] = 1;for ( int i = 1; i < R.Length - 1; i++ ) R[i] = pR[i] + pR[i - 1];R[R.Length - 1] = 1;return Print( R );}/// <summary>/// 打印出杨辉三角形/// </summary>/// <param name="result"></param>public static int[] Print( int[] result ){StringBuilder Space = new StringBuilder();string spaceChar = " ";for ( int i = 0; i < result.Length; i++ ) Console.Write( result[i].ToString() + spaceChar );Console.WriteLine();return result;}/// <summary>/// 打印居中的杨辉三角形/// </summary>/// <param name="n"></param>/// <returns></returns>public static int[] PrintYangHui( int TotalLevel, int Level ){if ( Level == 1 ) return Print( TotalLevel, new int[] { 1 } );if ( Level == 2 ){PrintYangHui( TotalLevel, Level - 1 );return Print( TotalLevel, new int[] { 1, 1 } );}int[] pR = PrintYangHui( TotalLevel, Level - 1 );int[] R = new int[Level];R[0] = 1;for ( int i = 1; i < R.Length - 1; i++ ) R[i] = pR[i] + pR[i - 1];R[R.Length - 1] = 1;return Print( TotalLevel, R );}/// <summary>/// 打印居中的杨辉三角形/// </summary>/// <param name="result"></param>public static int[] Print( int TotalLevel, int[] result ){StringBuilder Space = new StringBuilder();string spaceChar = " ";for ( int i = TotalLevel; i > result.Length; i-- ) Space.Append( spaceChar );Console.Write( Space );for ( int i = 0; i < result.Length; i++ ) Console.Write( FormatString( 5, result[i] ) + spaceChar );Console.WriteLine();return result;}/// <summary>/// 格式化数字串/// </summary>/// <param name="Len"></param>/// <param name="num"></param>/// <returns></returns>public static string FormatString( int Len, int num ){char[] outString;string strNum = num.ToString();int startIndex = 0;if ( strNum.Length < Len ){outString = new char[Len];startIndex = ( Len - strNum.Length ) / 2;}elseoutString = new char[strNum.Length];for ( int i = 0; i < outString.Length; i++ ){if ( i >= startIndex && i < startIndex + strNum.Length )outString[i] = strNum[i - startIndex];elseoutString[i] = '_';}return new String( outString );}}}

 

 

程序截图