
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Transcribed Image Text:Lab 16 Implementing bubble sort
In this lab, you will implement the bubble sort algorithm. The bubble sort is so called because it
compares adjacent items, "bubbling" the smaller one up toward the beginning of the array. By
comparing all pairs of adjacent items starting at the end of the array, the smallest item is guaranteed
to reach the beginning of the array at the end of the first pass.
The second pass begins again at the end of the array, ultimately placing the second smallest item in
the second position. During the second pass, there is no need to compare the first and second items,
because the smallest element is guaranteed to be in the first position.
Bubble sort takes at most n - 1 passes for an array of n items. During the first pass, n - 1 pairs
need to be compared. During the second pass, n - 2 pairs need to be compared. During the ith
pass, n - i pairs need to be compared. During the last pass, n - (n - 1) or one pair needs to be
compared. If, during any pass, no two adjacent items need to be interchanged, the array is in order
and the sort can terminate. If it continues, no further interchanges will occur.
Write a tester program to test the correctness of your bubble sort.
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