ex8_5.exe: ex8_5a.obj ex8_5b.obj
    ml /Feex8_5.exe ex8_5a.obj ex8_5b.obj

ex8_5a.obj: ex8_5a.asm ex8_5.a
    ml /c ex8_5a.asm

ex8_5b.obj: ex8_5b.asm ex8_5.a
    ml /c ex8_5b.asm