fibonacci查找

Posted 2022-01-31 royzzzzz

 1 #include "pch.h"
 2 #include <iostream>
 3 const int max_num = 50;
 4 //构造一个fib数列
 5 void ProduceFib(int *fib, int size) 
 6     int i;
 7     fib[0] = 1;
 8     fib[1] = 1;
 9     for (i = 2; i < size; i++) 
10         fib[i] = fib[i - 1] + fib[i - 2];
11     
12 
13 //fib查找
14 int FibSearch(int *data, int length, int serch_value) 
15     int lo, hi, mid, i, j, fib[max_num];
16     lo = 0;
17     hi = length - 1;
18     i = 0;
19     ProduceFib(fib, max_num);
20     //找到最接近数组长度的fib
21     while (hi > fib[i])
22     
23         i++;
24     
25     //补全有序数列
26     for (j = length; j < fib[i]; j++) 
27         data[j] = data[length-1];
28     
29     while (lo<=hi)
30     
31         mid = lo + fib[i - 1] - 1;
32         if (serch_value < data[mid]) 
33             hi = mid-1;
34             i = i - 1;
35          
36         else if (data[mid] < serch_value) 
37             lo = mid + 1;
38             i = i - 2;
39         
40         else if(data[mid]==serch_value)
41             if (mid < length - 1) 
42                 return mid;
43             
44             else
45             
46                 return length - 1;
47             
48     
49     return mid;
50 
51 int main()
52 
53     int arr[11] =  1,1,1,2,2,2,3,3,4,4,5 ;
54     size_t num=FibSearch(arr, 11, 3);
55     std::cout << num;
56 

编译会提示arr栈被破环了，因为你自行扩充了arr的长度，但是不影响你看结果。