利用opendir打开家目录，并循环使用readdir获取家目录下的所有文件的名称，并输出到终端 /home/gec

include <sys/types.h>

include <dirent.h>

include<stdio.h>

int main()
{
DIR *pdir;
opendir("./home/gec");
struct dirent *dir;

while((dir = readdir(pdir)) != NULL)
{
printf("%s\r\n",dir->d_name);
}
}