Hi!

I have one problem with structures, so could someone help me, please.

My problem is the following.

I dont know how to make a structure,
where is student number (integer), student name (string) and
student grades included subject (char) and grade (integer).

I was thinking somethng like this

struct STUDENT
{
    char  stunum[5];
    int stuname[30];
    char  grades[5][10]; // this is my problem
  };

struct STUDENT array[100];

Allowed subjects are O, V, L, S and T and grade from 0 to 5.

Could someone show me what is the best way to do this and how I should
call grades.

Thanks in advance!

Regards

--
Jarmo Tiittanen
Svanstr?minkuja 5-7 B22
00870 HELSINKI
http://www.*-*-*.com/ ~jacxs

       Student number is integer; why do you declare it as char array?

       Student name is a string; why do you declare it as array of
integers?

       Grades are pairs of (char; int); why do you declare it as an
array of arrays of chars?

   #define MAX_STUDENT_COUNT 100
   #define MAX_NAME_LENGTH 30
   #define SUBJECTS_COUNT 5

   struct grade { char subject_code;
                   int subject_grade
                };
   struct student { int student_number;
                    char student_name[MAX_NAME_LENGTH];
                    struct grade grades[SUBJECTS_COUNT];
                   };

   ....
   struct student students[MAX_STUDENT_COUNT];
   ....
   students[0].student_number = 1111;
   strcpy(students[0].student_name,"Tiittanen");
   students[0].grades[0].subject_code = 'V';
   students[0].grades[0].subject_grade = 5;
--
        Regards,
                Alex Krol
Disclaimer: I'm not speaking for Scitex Corporation Ltd

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Hi

Hups, I declared it by mistake in a hurry, but it seems that my declarations
was gone wrong places ;^) It should be int and...

... this should be char.... apuva. I was so hurry to go to play inline
hockey.

I was wondering if there is some way to declare there int too.

In that moment I have this same structure, so I thing this is the best way
to do this structure, isn't it?

Thanks Alex, you were very helpful.
--
Jarmo Tiittanen
Svanstr?minkuja 5-7 B22
00870 HELSINKI
http://www.dlc.fi/~jacxs

Groovy hepcat Jarmo Tiittanen was jivin' on Wed, 16 Jun 1999 16:29:41
+0300 in comp.lang.c.
Structure, where is one array inside the struct...'s a cool scene! Dig
it!

  I'm afraid your grasp of English seems to be quite poor, so this is
hard to understand. But fortunately I could understand from the code
you posted.

  I thought this was supposed to be an int. What's with the array of
char?

  And this should be an array of char, not array of int.

  Now, here you're way off base. What you need is an array with 5
elements, but an array of what? Well, each element must be able to
hold two items of data: a letter representing the subject, and a grade
(presumeably from 0 to 100). Sounds like another stuct to me.

  Define the struct with an inner nested struct, something like this:

struct STUDENT
{
  int num;
  char name[30];
  struct
  {
    char subject;
    int grade;
  }grade_data[5];

You can then read input into members of the struct something like
this:

#include <stdio.h>
#include <ctype.h>

#define MAX_NUM_STU 100

int yn_prompt(char *prompt);
int get_grade(char subject);

struct STUDENT
{
  int num;
  char name[30];
  struct
  {
    char subject;
    int grade;
  }grade_data[5];

int main(void)
{
  struct STUDENT stu[MAX_NUM_STU];
  int i, j;
  char subject[5] = "OVLST";

  i = 0;
  do
  {
    stu[i].num = i;

    printf("\nName of student: ");
    fflush(stdout);
    fgets(stu[i].name, sizeof stu[i].name, stdin);

    for(j = 0; j < 5; j++)
    {
      stu[i].grade_data[j].grade =
get_grade(stu[i].grade_data[j].subject = subject[j]);
    }

    i++;
  }while(i <= 100 && yn_prompt("\nEnter another?"));

  return 0;

int yn_prompt(char *prompt)
{
  char buf[20];
  int c;

  do
  {
    printf("%s (Y|N): ", prompt);
    fflush(stdout);
    fgets(buf, sizeof buf, stdin);
  }while((c = tolower(buf[0])) != 'y' && c != 'n');
  return c == 'y';

int get_grade(char subject)
{
  char buf[20];
  int n;

  do
  {
    printf("Grade for subject %c: ", subject);
    fflush(stdout);
    fgets(buf, sizeof buf, stdin);
  }while(sscanf(buf, "%d", &n) != 1 || n < 0 || n > 100);
  return n;

--

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