c语言展示目录下全部文件和目录

这是我第一次用c语言写个实例程序，拿出来请大侠指点指点，程序会遍历某个目录下所有文件和目录并以list的形式展示出来，下一级目录会在屏幕缩进4个char字符,目录都会以”/"结尾

#include<stdio.h>
#include<unistd.h>
#include<sys/stat.h>
#include<sys/types.h>
#include<dirent.h>


void printfDir(const char* path,int depth)
{

DIR *dir;
struct dirent *entry;
struct stat buf;


dir = opendir(path);

if(dir == NULL)
{
fprintf(stdout,"open this %s fail\n",path);
return;
}

chdir(path);   //进入目录
while((entry = readdir(dir)) != NULL)  //逐个读取目录总文件
{
lstat(entry->d_name,&buf);   //得到文件的各种属性，保存在struct buf中

if(S_ISDIR(buf.st_mode)){  //如果这个文件是目录
if(strcmp(".",entry->d_name)==0 || strcmp("..",entry->d_name)==0)//去掉"." ".."这两个目录
continue;
fprintf(stdout,"%*s%s/\n",depth,"",entry->d_name);
printfDir(entry->d_name,depth+4);
}
fprintf(stdout,"%*s%s\n",depth,"",entry->d_name);
}
chdir("..");
closedir(dir);
}

int main(int argc,char* argv[])
{
char *dir = ".";
if(argc>=2)
{
dir = argv[1];
}

fprintf(stdout,"Directory scanf of %s\n",dir);
printfDir(dir,0);
fprintf(stdout,"done\n");
exit(0);
}