initial commit

Organize the code. Declarations in functions.h, implementation in
functions.c and program code in main.c. Also, included Makefile to build
the program.

Author: fsaadatmand

chapter05/5-6/Makefile

@@ -0,0 +1,14 @@
+CC = clang
+CFLAGS = -g -Wall -Wextra -Werror -pedantic-errors
+DEPS = functions.h
+TARGET = main
+OBJ = $(TARGET).o functions.o
+
+%.o: %.cpp $(DEPS)
+	$(CC) -c -o $@ $< $(CFLAGS)
+
+$(TARGET): $(OBJ)
+	$(CC) -o $@ $^ $(CFLAGS)
+
+clean:
+	rm -f *.o $(TARGET) $(TEST)