Suppose you have created two separate .c files named main.c and avl.c (assuming you
chose to use avl tree for the data storage).  Further, suppose you have created a header file
name avl.h which is "included" at the beginning of both main.c and avl.c.

Now to compile main.c and avl.c separately and then produce a final executable
named Test1,  you can create a make file named "makefile", which contains the
following lines:


****************************************

Test1: [tab] main.o avl.o
[tab] gcc main.o avl.o -o Test1 

main.o: [tab] main.c avl.h
[tab] gcc -c main.c

avl.o: [tab] avl.c  avl.h
[tab] gcc -c avl.c

******************************************


Note here "[tab]" standing for the tab key

After you have created the make file, you can perform the compilations
by typing "make Test1" at the command line.
The executable named "Test1" will be generated.


The line "avl.o: [tab] avl.c avl.h"  specifies the dependency of avl.o on avl.c and avl.h.

The line "[tab] gcc -c avl.c" specifies the command to obtain avl.o.

Similarly, the line "Test1: [tab] main.o avl.o" specifies the dependency of Test1 on
avl.o and main.o

And the line "[tab] gcc main.o avl.o -o Test1" specifies the command to obtain the 
executable file Test1.