File list (Check if you may need any files):
biaoc\box.c
.....\day01\.abc.txt.swp
.....\.....\abc.txt
.....\.....\day01.txt
.....\....2\.06var.c.swp
.....\.....\01demo
.....\.....\01demo.c
.....\.....\01demo.h
.....\.....\01demo.o
.....\.....\02printf.c
.....\.....\03var.c
.....\.....\04var.c
.....\.....\05var.c
.....\.....\06var.c
.....\.....\a.out
.....\.....\day02.txt
.....\....3\.08bit.c.swp
.....\.....\01rect.c
.....\.....\02char.c
.....\.....\03circle.c
.....\.....\04sizeof.c
.....\.....\05scanf.c
.....\.....\06scanf.c
.....\.....\07bit.c
.....\.....\08bit.c
.....\.....\3
.....\.....\a.out
.....\.....\day03.txt
.....\....4\.10if.c.swp
.....\.....\01var.c
.....\.....\02opr.c
.....\.....\03opr.c
.....\.....\04logic.c
.....\.....\05bit.c
.....\.....\06addr.c
.....\.....\07tri.c
.....\.....\08type.c
.....\.....\09if.c
.....\.....\10if.c
.....\.....\a.out
.....\.....\day04.txt
.....\....5\.15for.c.swp
.....\.....\01if.c
.....\.....\02if.c
.....\.....\03year.c
.....\.....\04season.c
.....\.....\05for.c
.....\.....\06for.c
.....\.....\07for.c
.....\.....\08for.c
.....\.....\09for.c
.....\.....\10continue.c
.....\.....\11for.c
.....\.....\12rand.c
.....\.....\13guess.c
.....\.....\14for.c
.....\.....\15for.c
.....\.....\a.out
.....\.....\day05.txt
.....\....6\01for.c
.....\.....\02money.c
.....\.....\03while.c
.....\.....\04guess.c
.....\.....\05scanf.c
.....\.....\06printf.c
.....\.....\07arr.c
.....\.....\08arr.c
.....\.....\09arr.c
.....\.....\10arr.c
.....\.....\11arr.c
.....\.....\a.out
.....\.....\day06.txt
.....\....7\.08arr.c.swp
.....\.....\.day07.txt.swp
.....\.....\01arr.c
.....\.....\02arr.c
.....\.....\03rank.c
.....\.....\04arr.c
.....\.....\05arr.c
.....\.....\06arr.c
.....\.....\07arr.c
.....\.....\08arr.c
.....\.....\a.out
.....\.....\day07.txt
.....\....8\.12func.c.swp
.....\.....\01arr.c
.....\.....\02func.c
.....\.....\03read.c
.....\.....\04func.c
.....\.....\05func.c
.....\.....\06func.c
.....\.....\07func.c
.....\.....\08func.c
.....\.....\09func.c
.....\.....\10exit.c
.....\.....\11func.c
.....\.....\12func.c
.....\.....\a.out
.....\.....\day08.txt
.....\....9\.10ptr.c.swp