题目：I wish yesterday is tomorrow, then today is Friday. What is the actual date today?
思路：1.我希望昨天是明天，也就是说 假设的昨天 是 实际的明天 ： yesterday=tomorrow
2.实际的明天 就是 假设的今天-1 ： tomorrow=today-1
3. 假设的今天是周五：today=5
1 //wish today is 5,so wish yesterday is 4 .actual tomorrow = wish yesterday 2 public static void WhatIsToday() 3 { 4 int[] name = new int[3]; 5 6 for ( name[0] = 1; name[0] < 8; name[0]++) 7 { 8 for (name[1] = 1; name[1] < 8; name[1]++) 9 { 10 for (name[2] = 1; name[2] < 8; name[2]++) 11 { 12 if (name[1] == 5 && name[2] == name[1] - 1 && name[0] == name[2]) 13 { 14 int today = name[2] - 1; 15 string day = ""; 16 switch (today) 17 { 18 case 1: 19 day = "Monday"; 20 break; 21 case 2: 22 day = "Tuesday"; 23 break; 24 case 3: 25 day = "Wednesday"; 26 break; 27 case 4: 28 day = "Thursday"; 29 break; 30 case 5: 31 day = "Friday"; 32 break; 33 case 6: 34 day = "Satursday"; 35 break; 36 case 7: 37 day = "Sunday"; 38 break; 39 } 40 Console.WriteLine("today is " + day); 41 } 42 } 43 } 44 } 45 }
结果：
today is Wednesday