1             Console.Write("请输入一个数："); 2             int n = int.Parse(Console.ReadLine()); 3             for (int i = 1; i <= n; i++) 4             { 5                 for (int b = 1; b <= n - i; b++) 6                 { 7                     Console.Write("  "); 8                 } 9                 for (int j = 1; j <= 2 * i - 1; j++) 10                 {11                     Console.Write("☆");12                 }13                 Console.Write("\n");14             }15             for (int p = 1; p <= n; p++)16             {17                 for (int o = 1; o <= p; o++)18                 {19                     Console.Write("  ");20                 }21                 for (int k = 1; k <= 2 * (n - p) - 1; k++)22                 {23                     Console.Write("☆");24                 }25                 Console.Write("\n");26             }27 28                 Console.ReadLine();