C++实现折半插入排序

 1 # include<iostream>
 2 # include<cstdio>
 3 using namespace std;
 4 void BinaryInsertSort(int *_piArr,int len)
 5 {
 6     int i = 1,j = 0;
 7     int low = 0;
 8     int high = 0;
 9     int middle = 0;
10     for(;i < len;i++)
11     {
12         if(_piArr[i] >= _piArr[i-1])
13         {
14             continue;
15         }
16         low = 0;
17         high = i-1;
18         j = i;
19         int x = _piArr[i];
20         while(low <= high)
21         {
22             middle = (low+high)/2;
23             if(x < _piArr[middle])
24             {
25                 high = middle -1;
26             }else if(x > _piArr[middle]){
27                 low = middle + 1;
28 
29             }else{
30                 break;
31             }
32         }
33         while(j > low){
34             _piArr[j] = _piArr[j-1];
35             j--;
36         }
37         _piArr[low] = x;
38     }
39 }
40 int main()
41 {
42         int a[100];
43         int n;
44         cin>>n;
45         for(int i = 0;i < n;i++)
46         {
47             cin>>a[i];
48         }
49         BinaryInsertSort(a,n);
50         for(int i = 0; i < n;i++)
51         {
52             cout<<a[i]<<" ";
53         }
54 }
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