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#include <sys/types.h>
#include <dirent.h>
#include <stdio.h>
#include <errno.h>
int main(int argc,char *argv[])
{
DIR *dp;
struct dirent *dirp;
int n=0;
if (argc!=2)
{
printf("a single argument is required\n");
exit(0);
}
if((dp=opendir(argv[1]))==NULL)
printf("can't open %s",argv[1]);
while (((dirp=readdir(dp))!=NULL) && (n<=50))
{
if (n % 1 == 0) printf("\n");
n++;
printf("%10s ",dirp->d_name);
}
printf("\n");
closedir(dp);
exit(0);
}
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#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <stdio.h>
#include <errno.h>

int main(int argc,char *argv[])
{
DIR *dp;
struct dirent *dirp;
struct stat buf;
char tempDirName[100];
char dirNames[100][100];
int n=0,i=0,j=0,dirCount=0;
if (argc!=2)
{
printf("a single argument is required\n");
exit(0);
}
strcat(tempDirName,argv[1]);//get the directory name
if((dp=opendir(argv[1]))==NULL)
printf("can't open %s",argv[1]);
while (((dirp=readdir(dp))!=NULL) && (n<=50))
{
//if (n % 1 == 0) printf("\n");
n++;
//printf("%10s ",dirp->d_name);
strcpy(tempDirName,"");//clear
strcat(tempDirName,argv[1]);//get the directory name
strcat(tempDirName,dirp->d_name);
if(IsDirectory(tempDirName))
{
//printf("\tDirectory!!!!");
strcpy(dirNames[dirCount],dirp->d_name);
//printf("\