Introduction - If you have any usage issues, please Google them yourself
(1) mastering the sequential storage structure of the string;
(2) the sequence of verifying the sequence of sequence and its basic operations;
(3) mastering the operating characteristics of the string.
1.2 the experiment requires:
(1) define a head file function prototype that contains basic operations such as length, splicing and comparison size.
(2) the basic operation of realizing the length, splicing and comparison of the string.