编程实现模拟shell命令ls –l功能输出指定目录下的文件的详细信息，要求目录作为参数，目录下的每个文件的详细信息(包括权限，链接数，所有者，所属组，文件大小，时间，文件名)先组装成一行后输出。-Programming analog functions shell command ls-l output files under the specified directory details required directory as an argument, the directory of each file details (including permissions, number of links, owner, owning group, file size, time , the file name) and outputs the first assembled in a row.