linux下用c实现ls命令

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/stat.h>
#include <dirent.h>
#include <string.h>
int main(int argc,char* argv[])
{
DIR* dir = opendir(".");
struct dirent* ent=NULL;
while((ent = readdir(dir)))
{
if((ent->d_type == 4||ent->d_type == 8)&&ent->d_name[0]!='.')
printf("%s  ",ent->d_name);
}
closedir(dir);
puts("");
return 0;
}