剑指offer——面试题11：旋转数组的最小数字

 1 #include"iostream"
 2 using namespace std;
 3 
 4 int GetMinNumber(int *data,int len)
 5 {
 6     int left=0,right=len-1,mid;
 7 
 8     while(left<right-1)
 9     {
10         mid=(left+right)/2;
11         if(data[mid]>=data[left])
12             left=mid;
13         else if(data[mid]<data[right])
14             right=mid;
15     }
16     return data[right];
17 }
18 
19 void Test1()
20 {
21     cout<<"Test1:";
22     int data[]={3,4,5,1,2};
23     if(GetMinNumber(data,5)==1)
24         cout<<"passed."<<endl;
25     else
26         cout<<"failed."<<endl;
27 }
28 
29 void Test2()
30 {
31     cout<<"Test2:";
32     int data[]={3,4,5,6,1,2};
33     if(GetMinNumber(data,6)==1)
34         cout<<"passed."<<endl;
35     else
36         cout<<"failed."<<endl;
37 }
38 
39 void Test3()
40 {
41     cout<<"Test3:";
42     int data[]={2,1};
43     if(GetMinNumber(data,2)==1)
44         cout<<"passed."<<endl;
45     else
46         cout<<"failed."<<endl;
47 }
48 
49 int main()
50 {
51     Test1();
52     Test2();
53     Test3();
54     return 0;
55 }

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