new file:   Makefile
 	new file:   add2
 	new file:   add2.c
 	new file:   mvbin.sh
 	new file:   prog15_1
 	new file:   prog15_1.c
 	new file:   prog15_2
 	new file:   prog15_2.c
 	new file:   prog15_3
 	new file:   prog15_3.c
 	new file:   prog15_3.o
 	new file:   prog15_4
 	new file:   prog15_4.c
 	new file:   prog15_5
 	new file:   prog15_5.c
 	new file:   sync_pipe
 	new file:   sync_pipe.c
 	new file:   sync_pipe.o
 	new file:   toupper
 	new file:   toupper.c

  Changes not staged for commit:
    (use "git add <file>..." to update what will be committed)
    (use "git checkout -- <file>..." to discard changes in working directory)

 	modified:   ../include/public.h