Use object files instead of entire binary.

Makes for less assembly code to look through.

Makefile

@@ -1,11 +1,11 @@
 CPP=g++
 
-EXEC := 00-const-vars/const.exe 00-const-vars/no-const.exe 01-inline-functions/inline.exe 01-inline-functions/no-inline.exe
+EXEC := 00-const-vars/const.o 00-const-vars/no-const.o 01-inline-functions/inline.o 01-inline-functions/no-inline.o
 
 all: $(EXEC)
 
-%.exe: %.cpp
-	g++ $< -o $@
+%.o: %.cpp
+	g++ $< -o $@ -c
 
 clean:
 	$(RM) $(EXEC)