#include <iostream> using namespace std; int main() { int A[10], n=10, key; for(int i=0;i<n;i++){ cin>>A[i]; } cin>>key; int l = 0, h=n-1; while(l<=h){ int mid = (l+h)/2; if(key>A[mid]){ l = mid+1; } else if(key<A[mid]){ h = mid-1; } else{ cout<<"found key at "<<mid; return 0; } } cout<<"key not found"; return 0; }