黑马程序员-常用的必备代码段 

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九九乘法表

 1 /// <summary>
 2         /// 九九乘法表
 3         /// </summary>
 4         public static void JiuJiuChengFaBiao()
 5         {
 6             int i, j;
 7             for (i = 1; i < 10; i++)
 8             {
 9                 for (j = 1; j < 10; j++)
10                 {
11                     Console.Write("{0:00}*{1:00}={2,2}  ", i, j, i * j);
12                 }
13                 Console.WriteLine("");
14             }
15             Console.ReadLine();
16         }

 

冒泡排序

 1 /// <summary>
 2         /// 冒泡排序
 3         /// </summary>
 4         public static void MaoPao()
 5         {
 6             int[] ints = { 321, 321, 32, 4, 324, 353654, 64, 7, 56, 75, 43, 4, 3, 42, 5, 43, 42, 5, 34, 2 };
 7             //输出排序前的结果
 8             for (int i = 0; i < ints.Length; i++)
 9             {
10                 Console.WriteLine(ints[i]);
11             }
12             for (int i = 0; i < ints.Length; i++)
13             {
14                 for (int j = i; j < ints.Length; j++)
15                 {
16                     //判断大小
17                     if (ints[i] < ints[j])
18                     {
19                         int temp = ints[i];
20                         ints[i] = ints[j];
21                         ints[j] = temp;
22                     }
23                 }
24             }
25             //输出排序后的结果
26             for (int i = 0; i < ints.Length; i++)
27             {
28                 Console.WriteLine(ints[i]);
29             }
30         }

判断是否是质数

 1  /// <summary>
 2         /// 判断数字是否是质数/素数
 3         /// </summary>
 4         /// <param name="number">传入需要判断的数字</param>
 5         /// <returns>返回是否是质数/素数的结果为 Bool类型</returns>
 6         public static bool IsPrime(int number)
 7         {
 8             bool result = true;
 9             for (int i = 2; i <= number / 2; i++)
10             {
11                 if (number % i == 0)
12                     result = false;
13             }
14             return result;
15         }

水仙花数

View Code 
 /// <summary>
        /// 100-1000内的水仙花数
        /// </summary>
        public static void ShuiXianHuaShu()
        {
            int one = 0, two = 0, three = 0;
            for (int i = 100; i < 1000; i++)
            {
                three = i / 100;
                two = (i / 10) % 10;
                one = i % 10;
                if (i == one * one * one + two * two * two + three * three * three)
                    Console.WriteLine(i);
            }
        }
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posted @ 2013-04-05 15:21  AlianBlank  阅读(376)  评论(0)  编辑  收藏  举报