// #include
#include
#include
#include
int main(int argc, char *argv[]){
DIR *dp;
struct dirent *dirp;
if(argc==1)
dp = opendir(“./”);
else
dp = opendir(argv[1]);
while ( (dirp=readdir(dp)) != NULL)
printf(“%s\n”, dirp->d_name);
closedir(dp);
exit(0);
}