Cd and pwd commands time limit per test 3 seconds memory limit per test 256 megabytes input standard input output standard output Vasya is writing an operating system shell, and it should have commands for working with directories. To begin with, he
windows cmd 命令和 linux 命令 常用的内部命令有md.cd.rd.dir.path.copy.type.edit.ren.del.cls.ver.date.time.prompt.常用的外部命令有deltree.format.diskcopy.label.vol.sys.xcopy.fc.attrib.mem.tree. 内部命令在系统启动时就调入内存,是常驻内存的,所以执行效率高.外部命令是系统的软件功能,用户需要时才从硬盘中读入内存. 学习各种指令要系统,否则记不住并且容易