实验一
......\1.1.c
......\1.2.c
实验三
......\3.c
实验二
......\2.1.c
......\2.2.c
......\2.3.c
实验五
......\505.c
......\505.EXE
......\505.OBJ
实验四
......\4.c
......\4.EXE
......\4.OBJ