继承和派生

定义一个字符串类CStrOne，包含一个存放字符串的数据成员，能够通过构造函数初始化字符串，通过成员函数显示字符串的内容。-Inheritance and the definition of a string derived category CStrOne, contains a string of data storage member through the constructor can initialize the string, through the member functions display the contents of the string.