Answered: Write a C++ program that: (1) defines…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Write a C++ program that:

(1) defines and implements a hash class that constructs a 15 element vector, storing strings, using the following hash function:

((first_letter) + (last_letter) - (second_letter))% 15

So, for example, the word "rocky" would be

('r') = 114 + ('y') = 121 - ('o') = 111 = 124%15 = 4

In this example, an attempt would be made to store "rocky" in position 4. In the event of a collision, the word would be stored in the first available location, so if there is a collision in location 4, an attempt would be made to store the word in location 5. If an attempt to store a word in position 14 fails because the location is full circle back to location 0 because there is no location 15. If there is a collision in location 0, try location 1, and so on.

I will not try your program with words that are shorter than three letters, so you do not need to consider shorter words.

(2) the driver program should:

a. query the user for ten words and store them using the hash technique described above.

b. print out the contents of each position of the vector, showing vacant as well as filled positions. Remember, only 10 of the 15 positions will be filled.

c. repeatedly query the user for a target word, hash the word, check for its inclusion in the list of stored words, and report the result. Continue doing this task until the user signals to stop (establish a sentinel condition).

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