基于哈希表的一个对于英文文章单词拼写错误检查及更正的优化算法-A hash table based on the article for the English spelling error checking and correction algorithm

一个控制台中缀表达值求值程序，相当于一个科学计算器。只支持四则运算，不能纠错。数据结构必备。-A console infix expression value of the evaluation procedure, the equivalent of a scientific calculator. Only supports four operations, not error correction. Data structure is essential.