北京理工大学面向对象程序设计第三次上机习题答案~-1. Define MyString class with demands as follows:

　 1.1　MyString can save any string



　 1.2　Overload operator+ to append string to another one



　 1.3　Define Find function to locate the position of searching a character



　 1.4　Define Mid function to get substring　one string



　 1.5　The client can use MyString you define like as in the main:

　 void main()

　 {

　　　 MyString s1( China ), s2

　　　 s2 =　Love　

　　　 cout <<　I + s2+ s1



　　　 int pos = s1.Find( a )　 // pos is 4, or zero if　 a　 is not found.



　　　 int a = 1, b = 3

　　　 MyString my = s2.Mid(a, b)　 // a represents starting position, b represents length. So Mid can get substring.

　 }



　 NOTE: The type, string in C++, is forbidden in your program.





2. Define InternetURL class to save a URL string like as　www.bit.edu.cn ，and finish the demands as follows:

　 2.1　Use MyString you just finished before to save URL string；



　 2.2　Define member function getDomain