#include <iostream> #include <algorithm> using namespace std; bool binarysearch(int n,int target,int a[]) //函数传入数组格式:加[] { int left=0; int right=n-1; while(left<=right) { int middle=(left+right)/2; //中间元素 if(a[middle]>target) //左 { right=middle-1; } else if(a[middle]<target) //右...