C++primer第四版中的扩展文本查询，支持&|~ 注意输入查询条件的时候操作符与字符串之间要加空格。例如:~ it | ~ is 表示匹配既不含"it"又不含"is"的所有行。input.txt为查询文本。-The C++ primer fourth edition extended text queries, supported & | ~. attention to the input query spaces between the operator and the string. For example: ~ it | ~ is match contains neither the "it" contains "is" all rows. input.txt for the query text.