# This is a simple makefile for making "a.out" from two C source files. 
# Note leave a tab instead of spaces in front of $(CC)
CC=gcc
CFLAGS=-g -Wall

a.out: rio.o mytest.o
	$(CC) $(CFLAGS) -o a.out rio.o mytest.o
mytest.o: mytest.c rio.h
	$(CC) $(CFLAGS) -c mytest.c
rio.o: rio.c rio.h
	$(CC) $(CFLAGS) -c rio.c