wheat-yjy / SDU_DS_CDS

Searching Algorithms based on text collections.

SDU_DS_CDS

Project for DataStructure, implemented several search algorithms

Algorithms

Sequential Search Binary Search Red/Black Tree AVL Tree Hash

A text editor based on Qt

For searching

Comparing

Environment

Ubuntu16.04

QT 5.10.1

Qt Creator 4.5

The following is my summary of various search algorithms

1. Sequential Search

1. O(n)
2. Slow, with many operations

2. Binary Search

1. O(logn)
2. Divisoin is expensive, we can use shift to replace it. mid = (left +right) / 2 －> mid = (left + right) >> 1
3. optimizing methods： Fibonacci Search

3. Hash

1. Ｏ(1)
2. Hash function for string
3. the cost for saving is high

4. Binary Search Tree

1. O(logn)
2. Binary Search Tree
3. AVL Tree
4. Red/Black Tree

5. B-Tree

6. TrieTree