Update 1-1-adt.cpp

changes in Branch B3
Update 1-1-app.cpp

B3-2
Update BookAdd.java

B3-3
Update BookDelete.java

B3-4
Merge remote-tracking branch 'origin/B3' into C2

Conflicts:
	10code/1-1-adt.cpp
	10code/1-1-app.cpp
	10code/BookAdd.java
Merge branch 'C2' of https://github.com/Yankee666/lab4Internet into C2

Conflicts:
	10code/1-1-adt.cpp
	10code/1-1-app.cpp
	10code/BookAdd.java