java - number of comparisons of binary search - Stack Overflow

Return to Unit Menu Java Main Page MathBits. A strategy that is often used when playing this game is to divide the intervals between the guess and the ends of the range in half. This strategy helps you to quickly narrow in on the desired number.

When searching an array, the binary search process utilizes this same concept of splitting intervals in half as a means of finding the " key " value as quickly as possible. If the array that contains your data is in order ascending or descendingyou can search for the key item much more quickly by using a binary search algorithm " divide and conquer ". First, find the middle of the array by adding the array subscript of the first value to the subscript of the last value and dividing by two: The actual mathematical middle would be between the 4th and 5th subscripts, what is a binary options affiliate program we must work with integer subscripts.

The 4th subscript holds the integer number of comparisons in binary search c++, which comes before We know that 77 will be in that portion of the array to the right of We now find the middle of the right portion of the array by using the same approach. Now find the middle of the portion gold coast stock brokers the array to the right of 52, but to the left of You must start with a pre-sorted array!!!

You may wish to return the result of the binary search to be used in further investigations.

To do so, return the "position" if the value is found and return a negative number for example if the result is not found. Consider the following array of integers: Array of integers, named numarranged in "ascending order"!!

Do you remember playing the game "Guess a Number"where the responses to the statement "I am thinking of a number between 1 and " are "Too High", "Too Low", or "You Got It!