Use the makefile to compiler my CFile Under LinuxOS

These is code file as following:
-----
Add.h
Add.c
Main.c
Head.h
-----

Then, I will Use the Order:［ make ］to compiler my file.
Error:one
[
mrzhangqj@mrzhangqj-Rev-1-0:~/Code/TestC++$ gcc -c Add.c
Add.c: In function ‘add’:
Add.c:5:1: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]
Add.c: In function ‘printAdd’:
Add.c:11:1: warning: incompatible implicit declaration of built-in function ‘printf’ [enabled by default]
]


Error:two
[
makefile:2: *** missing separator.  Stop.
]


solution:
1:gcc -I /usr/include -c Add.c
2:Tab

PIC:

so easy to solve!