#include <iostream>using namespace std;int search(int key){ int i; int a[150]; for(i=0;i<150;i++) {        a[i]=i; } int low=0,high=149,mid; while(low<=high) {         mid=(low+high)/2;   if(a[mid]==key)  {   return mid;  }  else      if(a[mid]<key)       low=mid+1;   else   high=mid-1; }    return 0;}int main(){ int a,num; cout<<"输入要查找的数1-150"<<endl; cin>>a; num=search(a); if(num==0) {     cout<<"您输入的数不存在"<<endl; } else cout<<a<<"是"<<num<<"数"<<endl; return 0;}