#include<iostream> #define N 10 using namespace std; int main(){ int i,a[N]={1,2,3,4,5,6,7,8,9,10},low=0,high=N-1,mid,x=-1,m; for(i=0;i<N;i++) printf("%d ",a[i]); printf("\n"); scanf("%d",&m); while(low<=high) { mid=(low+high)/2; if(m<a[mid]) high=mid-1; else if(m>a[mid]) low=mid+1; else { x=mid; break; } } if(x>=0) printf("x=%d,index=%d\n",m,x); else printf("Not be found!\n"); return 0; }