字符串的操作：１．掌握字符串的操作；２．理解动态内存分配机制。声明一个Employee类，其中包括表示姓名、街道地址、城市和邮编等属-String: 1. To grasp the string operation Understanding of dynamic memory allocation mechanism. Declare an Employee class, including the said name, street address, city and zip code a