例程
....\3_1.lst
....\3_1.obj
....\lesson3_1
....\lesson3_1.c
....\lesson3_1.hex
....\lesson3_1.lnp
....\lesson3_1.LST
....\lesson3_1.M51
....\lesson3_1.OBJ
....\lesson3_1.Opt
....\lesson3_1.plg
....\lesson3_1.Uv2
....\lesson3_1_Opt.Bak
....\lesson3_1_Uv2.Bak
....\lesson3_2.c
....\lesson3_2.LST
....\lesson3_2.OBJ
....\lesson3_3.c
....\lesson3_3.LST
....\lesson3_3.OBJ
....\lesson3_4.c
....\lesson3_4.LST
....\lesson3_4.OBJ