package BinarySerach;import java.util.Scanner;public class BinarySerch {/***折半查找和快速排序*/static final int N = 15;static void quickSort(int [] array,int left,int right){int f,t;int ltemp =left;int rtemp = right;//確定分界值f = array[(left+right)/2];while(ltemp < rtemp){while(array[ltemp] <f){++ltemp;}while(array[rtemp] > f){--rtemp;}if(ltemp <= rtemp){t = array[ltemp];array[ltemp] = array[rtemp];array[rtemp] = t;--rtemp;++ltemp;}if(ltemp == rtemp){ltemp++;}if(left < rtemp){quickSort(array, left, ltemp-1);}if(ltemp < right){quickSort(array, rtemp+1, right);}}}//折半查找static int searchFun(int a[],int n,int x){int mid,low,high;low = 0;high = n-1;while(low <= high){mid = (low+high)/2;if(a[mid] == x){return mid;}else if(a[mid] > x){high = mid -1;}else{low = mid+1;}}return -1;}public static void main(String[] args) {int [] shuzu = new int[N];int x,n,i;for(i=0;i<N;i++){shuzu[i] = (int)(100+Math.random()*(100+1));}for(i=0;i<N;i++){System.out.print(" "+shuzu[i]);}System.out.println("輸出排序的結果：");quickSort(shuzu, 0, N-1);for(i=0;i<N;i++){System.out.print(" "+shuzu[i]);}System.out.println();System.out.println("輸入要查找的數字");Scanner input = new Scanner(System.in);x = input.nextInt();n = searchFun(shuzu, N, x);System.out.println(n);if(n < 0){System.out.println("沒有找到");}else{System.out.println("數據："+x+"位于數組中的第"+(n+1)+"個元素處。");}}}

　　

轉載于:https://www.cnblogs.com/aicpcode/p/4271366.html

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