case study: Spell Checker

to illustrate trie in C++

• before providing a dictionary file
• after providing a dictionary file
• implement strupr
• create files trie.h and trie.cpp
• create an instance of class Trie
• add const notFound to class Trie
• create class TrieNonLeafNode
• constructor of TrieNonLeafNode

ch7.4 Case Study: Spell Checker p373/391 of