2.1-binSearch and fibSearch

Posted 2021-03-07 wsshub

二分查找和斐波那契查找

 1 #include<iostream>
 2 using namespace std;
 3 class Fib{
 4     public:int f,g;
 5     Fib(int n)
 6          {
 7         f=1,g=0;
 8         while(g<n)
 9         next();}//因构造函数返回函数 
10         
11         int next(){
12             g=g+f;
13             f=g-f;
14             return g;
15         }
16         int get(){
17             return g;
18             }
19         int prev(){
20             f=g-f;
21             g=g-f;
22             return g;
23         }
24     
25 };
26 int binSearch(int *A,int e,int lo,int hi){
27     while(lo<hi){
28         int mi=(lo+hi)>>1;
29         if(e<A[mi])hi=mi;
30         else if(e>A[mi])lo=mi+1;
31         else
32         return mi;
33     }
34     return -1;
35 }
36 int fibSerach(int *A,int e,int lo,int hi){
37     Fib fib(hi-lo);
38     while(lo<hi){
39         while(hi-lo<fib.get())
40         fib.prev();
41         int mi=lo+fib.get()-1;
42             if(e<A[mi])hi=mi;
43         else if(e>A[mi])lo=mi+1;
44         else
45         return mi;
46     }
47 }
48 
49 int main(){
50     
51     
52     return 0;
53 }