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wrong print

P: n/a
Hi!

This is a piece of a code I wrote. It was perfectly working but now it
is giving me some problems I can not understand.
I scan a directory (ss_data) and I count its alaments. then I print the
name of each file in the directory before opening it.Even if the names
of the files are stored correctly in the memory the program prints the
letter 'E'(the files are named differently,
e.g.traind05c1__a.1.1.1.3.fasta). The program correctly opens the files
but it does not print the names. Anybody can help?

Thank you in advance,

Chiara

#include <string.h>
#include <stdio.h>
#include <dir.h>
#include <dirent.h>
#include <stdlib.h>
#include <alloc.h>
#include <math.h>

char **strings,*line;
int n_seq=0;
int max_line_len = 1024;
char **Amm,**Pss;
int** amm_comp,*y_class,*y_fold,**ss_descriptor;
char** SS;
int** L,**range;
int n_files,n_el,max_length;
void generateSeq(int max_l,char* seq,int seq_len);
char* readline(FILE *input);
void scandir(char *dirname);
void analyzePss(char* pss,int ind);
int SearchSequence(char* seq, char* in);
int SearchRange(int* seq,int l, int low, int up);

void scandir(char *dirname)
{
DIR *dir;
FILE*fp;
char s[MAXPATH],amm,pss;
struct dirent *ent;
float pC, pH,pE;
int index,i,h,k=0,max_l,n=0;

dirname="ss_data";

if ((dir = opendir(dirname)) == NULL)
{
perror("Unable to open directory");
exit(1);
}
while ((ent = readdir(dir)) != NULL) //reads the directory counting
the number of files
{
if(strlen(ent->d_name)>5)
n_files++;
}

...
rewinddir(dir);
h=0;
while ((ent = readdir(dir)) != NULL)//reads the name of each file in
the directory
{
if(strlen(ent->d_name)>5)
{
printf("%d:%s\n",h,ent->d_name);

.....
...

Nov 15 '05 #1
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2 Replies


P: n/a
chiara wrote:
Hi!

This is a piece of a code I wrote. It was perfectly working but now it
is giving me some problems I can not understand.
I scan a directory (ss_data) and I count its alaments. then I print the
name of each file in the directory before opening it.Even if the names
The C programming language does not know anything about directories, so
you must be using non-standard libraries. We only deal with the standard
language and libraries here. Still, I'll check your code in case there
is anything wrong with the standard bits...
of the files are stored correctly in the memory the program prints the
letter 'E'(the files are named differently,
e.g.traind05c1__a.1.1.1.3.fasta). The program correctly opens the files
but it does not print the names. Anybody can help?

Thank you in advance,

Chiara

#include <string.h>
#include <stdio.h>
The above are standard.
#include <dir.h>
#include <dirent.h>
The above two headers are not part of the C standard, they could be from
some form of Unix, so comp.unix.programmer might be worth investigating,
after checking their FAQ and a few days worth of posts.
#include <stdlib.h>
Another standard header.
#include <alloc.h>
A very suspicions non-standard header. Are you really sure it is
something you need?
#include <math.h>

char **strings,*line;
int n_seq=0;
int max_line_len = 1024;
char **Amm,**Pss;
int** amm_comp,*y_class,*y_fold,**ss_descriptor;
Putting the * (or **) on the type is generally considered bad style,
since it only applies to the first variable, not all the variables.
char** SS;
int** L,**range;
int n_files,n_el,max_length;

void generateSeq(int max_l,char* seq,int seq_len);
char* readline(FILE *input);
void scandir(char *dirname);
void analyzePss(char* pss,int ind);
int SearchSequence(char* seq, char* in);
int SearchRange(int* seq,int l, int low, int up);

void scandir(char *dirname)
{
DIR *dir;
FILE*fp;
char s[MAXPATH],amm,pss;
struct dirent *ent;
float pC, pH,pE;
int index,i,h,k=0,max_l,n=0;

dirname="ss_data";

if ((dir = opendir(dirname)) == NULL)
Problems with opendir don't belong here.
{
perror("Unable to open directory");
exit(1);
1 is a non-standard value for exit.
}
while ((ent = readdir(dir)) != NULL) //reads the directory counting
the number of files
Please don't use // style comments when posting to Usenet.
{
if(strlen(ent->d_name)>5)
n_files++;
}

...
Not posting a complete compilable program that exhibits your problem is
a very silly thing to do. Since you don't know what the problem is how
do you know that it problem is not in the code you have excluded?
rewinddir(dir);
You do realise that in a multi-tasking multiuser system a new file could
have been created by now, or one of the old file deleted, don't you?
h=0;
while ((ent = readdir(dir)) != NULL)//reads the name of each file in
the directory
{
if(strlen(ent->d_name)>5)
{
printf("%d:%s\n",h,ent->d_name);

....
...


My best guess is that there is something wrong in the code you have not
posted or something wrong in your use of a non-standard C library. I
suggest that if I am correct and you are using a Unix variant you try in
comp.unix.programmer where Unix specific libraries are on topic, unlike
here. Before posting for the first time to a group ALWAYS read the FAQ
and at least a few days worth of posts to find out what is acceptable on
the group. If you don't understand something in the FAQ then tell people
which part of the FAQ you have problems with or they might assume that
you have not read it and just tell you to go read it. Also, post a
COMPLETE example that exhibits the problem, not something with
quantities of code missing. To get the example down to a sensible size
delete the code that you believe is not relevant to the problem and then
*test* to see that the problem still exists, often this exercise itself
will identify that the problem is NOT where you thought and might enable
you to solve it.
--
Flash Gordon
Living in interesting times.
Although my email address says spam, it is real and I read it.
Nov 15 '05 #2

P: n/a
Flash Gordon wrote:
chiara wrote:
Hi!

This is a piece of a code I wrote. It was perfectly working but now it
is giving me some problems I can not understand.
I scan a directory (ss_data) and I count its alaments. then I print the
name of each file in the directory before opening it.Even if the names

The C programming language does not know anything about directories, so
you must be using non-standard libraries. We only deal with the standard
language and libraries here. Still, I'll check your code in case there
is anything wrong with the standard bits...


<snip>

Problems with opendir don't belong here.
{
perror("Unable to open directory");
exit(1);

1 is a non-standard value for exit.


The OP may be interested to know that EXIT_FAILURE
is an option here (from <stdlib.h>). EXIT_SUCCESS
and 0 have the same meaning.

--
imalone
Nov 15 '05 #3

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