Serach
3697 ワード
1.二分検索
1 public class BubbleSort {
2 public static int binarySerach(int[] a,int value){
3 int low=0;
4 int high=a.length-1;
5 int min=(low+high)/2;
6 while(low<=high){
7 if(value==a[min]){
8 return min;
9 }
10 if(value>a[min]) low=min+1;
11 else high=min-1;
12 min=(low+high)/2;
13 }
14 return -1;
15 }
16
17 public static void main(String[] args){
18 int[] a={1,3,5,6,7,8,11,15,19,22,23};
19 int value=1;
20 int i=binarySerach(a,value);
21 //System.out.println(i);
22 if(i>0) System.out.println(value+" "+i+" ");
23 else System.out.println(" ");
24
25 }
26 }