C#迷你猜数实例分析

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Threading.Tasks; 
namespace 迷你猜数 
{ 
 class Program 
 { 
  static void Main(string[] args) 
  { 
   List<int> LisData = GetData(); 
   LisData = FilterData(LisData, 4659, 0, 1); 
   LisData = FilterData(LisData, 8763, 0, 1); 
   LisData = FilterData(LisData, 1035, 0, 1); 
   LisData = FilterData(LisData, 3249, 1, 1); 
   LisData = FilterData(LisData, 0497, 0, 2); 
   LisData = FilterData(LisData, 9148, 0, 2); 
   foreach(var num in LisData) 
   { 
    Console.WriteLine(num); 
   } 
   Console.ReadKey(); 
  } 
  /// <summary> 
  /// 获取所有可用数据 
  /// </summary> 
  /// <returns></returns> 
  private static List<int> GetData() 
  { 
   List<int> LisData = new List<int>(); 
   for (int i = 0; i < 10; i++) 
   { 
    for (int j = 0; j < 10; j++) 
    { 
     for (int k = 0; k < 10; k++) 
     { 
      for (int m = 0; m < 10; m++) 
      { 
       if((i!=j) && (i!=k) && (i!=m) && (j!=k) && (j!=m) && (k!=m)) 
       { 
        LisData.Add(i * 1000 + j * 100 + k * 10 + m); 
       } 
      } 
     } 
    } 
   } 
   return LisData; 
  } 
  private static List<int> FilterData(List<int> LisData,int Num,int a,int b) 
  { 
   List<int> lisDataNum=new List<int>(); 
   int[] LisNum = new int[4]; 
   //将Num拆分成一个数组 
   int[] Numnum = SplitNum(Num); 
   foreach(var Data in LisData) 
   { 
    int aNum = 0; 
    int bNum = 0; 
    //将Data拆分成一个数组 
    LisNum = SplitNum(Data); 
    #region 求a，b的个数 
    for (int i=0;i<4;i++) 
    { 
     //求a的个数 
     if(Numnum[i]==LisNum[i]) 
     { 
      aNum++; 
     } 
     //求b的个数 
     for(int j=0;j<4;j++) 
     { 
      if(Numnum[i]==LisNum[j]) 
      { 
       bNum++; 
      } 
     } 
    } 
    bNum -= aNum; 
    #endregion 求a,b的个数 
    //判断a,b 
    if((aNum==a)&&(bNum==b)) 
    { 
     lisDataNum.Add(Data); 
    } 
   } 
   return lisDataNum; 
  } 
  /// <summary> 
  /// 拆分四位数 
  /// </summary> 
  /// <param name="Num"></param> 
  /// <returns></returns> 
  private static int[] SplitNum(int Num) 
  { 
   int[] Numnu = new int[4]; 
   for (int i = 0; i < 4; i++) 
   { 
    Numnu[i] = Num % 10; 
    Num = Num / 10; 
   } 
   return Numnu; 
  } 
 } 
}