打印沙漏(C#实现)

1*****
2 ***
3  *
4 ***
5*****

119 *

1*****
2 ***
3  *
4 ***
5*****
62

1using System;
2using System.Collections.Generic;
3using System.Linq;
4using System.Text;
5namespace PrintSandglass {
6
7    class CalNum {
8
9        public int GetNum (string n, ref int r) {
10            int Num = int.Parse (n); // 字符串转化为int
11            Num--;
12            r = Num % 2;
13            Num /= 2;
14            int i;
15            for (i = 3; Num > 0; i += 2) {
16
17                Num = Num - i;
18
19                if (Num == 0) {
20
21                    return i;
22
23                    break;
24                }
25            }
26
27            r = (r + (Num + i - 2)) * 2;
28
29            return (i - 4);
30        }
31        public void DisplaySandglass (int i) {
32            int count = 0, t = i, tcount = 0;
33            int LastNum = i;
34            for (int j = i / 2; j > 0; j--) {
35                // for (tcount = count; tcount >= 1; tcount--) { // C#一定要括起来 哪怕只有一条语句
36                //     System.Console.Write (" ");
37                //}
38                for (t = i; t >= 1; t--) {
39                    System.Console.Write ("*");
40                }
41                i -= 2;
42                count++;
43                System.Console.Write ("\n");
44                for (tcount = count; tcount >= 1; tcount--) {
45                    System.Console.Write (" ");
46                }
47            }
48            System.Console.Write ("*\n");
49
50            count = --count;
51            t = (i += 2);
52
53            tcount = 0;
54            for (int j = 0; j < LastNum / 2; j++) {
55                for (tcount = count; tcount >= 1; tcount--) { // C#一定要括起来 哪怕只有一条语句
56                    System.Console.Write (" ");
57                }
58                for (t = i; t >= 1; t--) {
59                    System.Console.Write ("*");
60                }
61                i += 2;
62                count--;
63                System.Console.Write ("\n");
64
65            }
66
67        }
68
69    }
70
71    class MainEntrance {
72        static int Main (string[] args) {
73            string n = Console.ReadLine ();
74            int r = 0;
75            CalNum c = new CalNum ();
76            int LastNum = c.GetNum (n, ref r);
77
78            c.DisplaySandglass (LastNum);
79
80            System.Console.WriteLine ("{0}", r);
81            return 0;
82        }
83    }
84}