What is binary search in c++

Now we have to come up with a guess.

Binary Search in C++

Can't believe I missed that. Since that is not the case, we will now discard half of the array. Because our guess was too low, we discard the bottom half of the array by increasing the min , conversely to what we previously did to max:.

what is binary search in c++

Since index value 5 returns 8, we are now one over our target. So we only work on those values on which it makes sense to keep guessing. I don't know what I'm doing incorrectly. We repeat the process again, and we are left with:. Jim Yang Jim Yang 400 1 10. I'll keep that idea in mind next time while debugging. Stack Overflow works best with JavaScript enabled.

C++ Program Binary Search

I have it set to print out the numbers so I can can input a number I'm sure is in the array, but when I put in a number that I see is there, it almost always returns false. It never occurred to me to print it out as the function was operating. Related 2851. I did have it printing out the contents of the array beforehand. I have it set to print out numbers like this: Never miss a story from freeCodeCamp.

Thank you so much.

what is binary search in c++

Since our original guess of 14 was greater than 7, we now decrease it by 1 and store that into max:. The smartest thing to do would be to guess an index value in the middle of the array.

Binary Search in C++ Standard Template Library (STL)

And we are left with only one value, 4, as the index of the target number we were looking for, which was 7. The purpose of binary search is to get rid of half of the array at every iteration.

what is binary search in c++

If this question can be reworded to fit the rules in the help center , please edit the question. There are 17 items in total and the index values go from 0 to 16. After the first iteration, our search is now within:

what is binary search in c++