北京理工大学面向对象程序设计第二次上机习题答案-1. Here is the codes：



#include <iostream>

using namespace std

void main()

{

　　cout <<　Hello World!\n　

}





Add some codes and get the results as follows:





Initialize

Hello, World!

Clear up





NOTES: Don t modify the MAIN function any way!









2.Define an integer set class which is named Set with some memeber functions as follows:

　a. IsExist(): To judge if an integer is a member of a Set or not

　b. DeleteItem(): To delete an integer　the Set

　c. IsEqual(): To judge if two Sets are equal or not

　d. Intersection(): To intersection with another Set　(交集）

　e. Union: To union with another Set. （并集）

　

NOTES:In order to complement Set class, you can define constructor, member functions with available arguments as well as destrctor if you need.









3.Create a class, IntChar, to archieve an integer to save an string which length is no more than 4.

　Suppose that a character length is 1 byte.



　For example:　ABCD , it s binary form as