Help on my code please.

I am currently trying on this code, and I want the output to be the same as the input, but my code fails to do that. Please help me out.

Code:

---

/*
 * A sample program to read-from and write-to files. Also shows how to
 * send a file as a parameter and display error messages to standard
 * error.
 */
#include "test.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <conio.h>



int main () {
    STUDENT stuArr[MAX_STUDENTS];
    void rmNl ( char s[] );
    void *fin, *fout;
    void grades_in(FILE *fin, FILE *fout, STUDENT stuArr[MAX_STUDENTS]);
   
  /* Open file to read input data */
  if ( ( fin = fopen ( "grades.in", "r" ) ) == NULL ) {
      fprintf ( stderr, "Could not open file grades.in\n" );
      exit ( -1 );
  }

  /* Open file for writing output */
  if ( ( fout = fopen ( "grades.out", "w" ) ) == NULL ) {
      fprintf ( stderr, "Could not open file grades.out\n" );
      fclose ( fin );
      exit ( -1 );
  }
  grades_in(fin, fout, stuArr);
  system ("PAUSE");   
  return 0;
}
 
 
void grades_in(FILE *fin, FILE *fout, STUDENT stuArr[MAX_STUDENTS]) {
  int numItems = 0;
  char buf[MAX_STUDENTS]; 
  char fname[50], lname[50];
  int h1, h2, h3, h4, h5, e1, e2, e3, id; 
  while( fgets ( buf, MAX_STUDENTS, fin ) != NULL ) {
            rmNl ( buf );
            if ( !lineWithBlanks ( buf ) )
            if ( sscanf(buf, "%s %s", fname, lname) == 2 ) printf ("%s %s\n", fname, lname);
            if ( sscanf(buf, "%d", &id) == 1 ) printf ("%d\n", id);
            if ( sscanf(buf, "%d %d %d %d %d", &h1, &h2, &h3, &h4, &h5) == 5 ) printf ("%d %d %d %d %d\n", h1, h2, h3, h4, h5);
            if ( sscanf(buf, "%d %d %d", &e1, &e2, &e3) == 3 ) printf ("%d %d %d\n", e1, e2, e3);
            numItems++;
            continue;


  }
 
 
 
 
}     












/*
 * Function to remove new line character
 */
void rmNl ( char str[] )
{
  char *ptr;

  if ( ( ptr = strchr ( str, '\n' ) ) )
      *ptr = '\0';
}
       


/*
 * Check to see if line is an empty one with only spaces
 * Returns 1 if line consists of blank spaces, 0 otherwise
 */
int lineWithBlanks ( char *s )
{
  int result = 1, i;

  for ( i = 0; i < strlen (s); i++ ) {
      if ( s[i] != ' ' ) {
        result = 0;
        break;
      }
  }
  return result;
}

---

my input data looks like this:

John Doe
1111
98 87 69 97 89
85 91 88
Bill Doe
2222
77 78 87 79 85
69 73 89

Well....from what I can see you've got a couple problems,

Code:

---

int main () {
    STUDENT stuArr[MAX_STUDENTS]; STUDENT, MAX_STUDENT, are these in test.h? what are they?
    void rmNl ( char s[] );function declarations should be outside of main
    void *fin, *fout;void? should be FILE
    void grades_in(FILE *fin, FILE *fout, STUDENT stuArr[MAX_STUDENTS]);function declaration again
   
  /* Open file to read input data */
  if ( ( fin = fopen ( "grades.in", "r" ) ) == NULL ) {grades.in?
      fprintf ( stderr, "Could not open file grades.in\n" );
      exit ( -1 );
  }

  /* Open file for writing output */
  if ( ( fout = fopen ( "grades.out", "w" ) ) == NULL ) {grades.out?
      fprintf ( stderr, "Could not open file grades.out\n" );
      fclose ( fin );
      exit ( -1 );
  }
  grades_in(fin, fout, stuArr);
  system ("PAUSE");   
  return 0;
}

---

give that stuff a try then post again.
Hope that helps,
Crazed

Thank you for your help. Now I have a question: If I have an input data which looks like this:

Code:

---

John Doe
1111
98 87 69 97 89
85 91 88
Bill Doe
2222
77 78 87 79 85
69 73 89

---

how do I use fgets and sscanf with it? It seems my code doesn't scan to all the data...

This is the latest of my code editted. I just paste the fgets and sscanf part so it will be easier for you guys to examine it:

Code:

---

  while( fgets ( buf, MAX_STUDENTS, datain ) != NULL ) {
      rmNl ( buf );
      if( !lineWithBlanks ( buf) ) {

            if ( counter == 1 && (buf[0] != ' ')) {
                if ( sscanf(buf, "%s %s", fname, lname) == 2 ) printf ("%s %s\n", fname, lname);
                else printf("fail");
            }
            else if ( counter == 2 && (buf[0] != ' ')) {
                if ( sscanf(buf, "%d", &id) == 1 ) printf ("%d\n", id);
                else printf("fail");
            }
            else if ( counter == 3 && (buf[0] != ' ')) {
                if ( sscanf(buf, "%d %d %d %d %d", &h1, &h2, &h3, &h4, &h5) == 5 ) printf ("%d %d %d %d %d\n", h1, h2, h3, h4, h5); 
                else printf("fail");
            }
            else if ( counter == 4 && (buf[0] != ' ')) {
                if ( sscanf(buf, "%d %d %d", &e1, &e2, &e3) == 3 ) printf ("%d %d %d\n", e1, e2, e3);
                else printf("fail");           
            }
            counter++;
            continue;

      }

---

The output of the code is this:
John Doe
1111
98 87 69 97 89
85 91 88

It doesn't loop the second time, weird.

Get rid of the newline left hanging in the buffer. The second call to fgets() will get a blank string, which isn't what you want. FAQ: http://faq.cprogramming.com/cgi-bin/...&id=1043284392