king06(1)% ls
IntList.cpp  IntList.h	Makefile  testIntList.cpp  
king06(2)% make
g++ -c testIntList.cpp
g++ -c IntList.cpp
g++ testIntList.o IntList.o
king06(3)% ls
a.out	     IntList.h	Makefile	 testIntList.o
IntList.cpp  IntList.o	testIntList.cpp  
king06(4)% rm IntList.o
rm: remove regular file `IntList.o'? y
king06(5)% make
g++ -c IntList.cpp
g++ testIntList.o IntList.o
king06(6)% make clean
rm *.o
king06(7)% ls
a.out  IntList.cpp  IntList.h  Makefile  testIntList.cpp  
king06(8)% make
g++ -c testIntList.cpp
g++ -c IntList.cpp
g++ testIntList.o IntList.o
king06(9)% make IntList.o
make: `IntList.o' is up to date.