using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace _2 class Program static void Main(string args) Console.WriteLine(说明：n代表金字塔的行 ); Console.WriteLine(); int n ;/ n：行 Console.WriteLine(输入一个数（n）:); n=int.Parse(Console.ReadLine(); int d = n * 2 - 1;/列与行的关系式 /上半部菱形 for (int i = 1; i = n; i+)/行 for (int j = 1; j = n - i; j+)/输出每行左边的空格 Console.Write( ); for (int j = 1; j = 1; i-) for (int j = n - i ; j = 1; j-) Console.Write( ); for (int j = 1; j = i; j+) Console.Write( *); Console.Write(n);/换行 Console.ReadKey();