Nested Structure help ~

First, lets view the question...
(i) Declare a tagged structure called DATE which consists of the following members:
month (eg. 12)
day (eg. 5)
year (eg. 2001)
(ii) Using typedef, declare a structure called STUDENT with the following members:
StudentName (eg. Wilson Tan Wing Soon)

ICNo (eg. 890225-06-0025)
BirthDate (eg. as in (i) shown above)
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My coding so far....

Code:

#include <stdio.h>
#include <stdlib.h>

struct DATE {

    int month;

    int day;

    int year;

}

typedef struct{

  char name[30];

  char ic[30];

  DATE date;

  } STUDENT;



int main(void)

{

    return 0;

}

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Help me ~ what mean by (ii) BirthDate? It say shown above?

Originally Posted by Siaw

Help me ~ what mean by (ii) BirthDate? It say shown above?

Code:

typedef struct{
  char name[30];
  char ic[30];
  DATE birthdate;
  } STUDENT;

Oh...I understand but now got an error...
Error below
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C:\Documents and Settings\Administrator\Desktop\Q5.c|20|error: expected specifier-qualifier-list before 'DATE'|
C:\Documents and Settings\Administrator\Desktop\Q5.c|22|error: two or more data types in declaration specifiers|
||=== Build finished: 2 errors, 0 warnings ===|
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How can I solve this error?

Code:

typedef struct{
  char name[30];
  char ic[30];
  struct DATE birthdate;
  } STUDENT;

Very thanks you. But now its still remains one error...

C:\Documents and Settings\Administrator\Desktop\Q5.c|22|error: two or more data types in declaration specifiers|
||=== Build finished: 1 errors, 0 warnings ===|

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Read the error message... it's telling you there's an error on line 22 of your code (which I obviously cannot see)...
So you need to look at that line and fix it.

Hmm...I try to figure it out but I still don't know what wrong...so I think I post my codes.

Code:

#include <stdio.h>
#include <stdlib.h>

struct DATE {

    int month;

    int day;

    int year;

}

typedef struct{

  char name[30];

  char ic[30];

  struct DATE birthdate;

  } STUDENT;



int main(void)

{




    return 0;

}

Code:

struct DATE { 
    int month; 
    int day; 
    int year; 
}; //<----------------------

*cough*

It gets me every time, too.

Lol...I never thinks is this problem....very thanks

Originally Posted by bernt

Code:

struct DATE { 
    int month; 
    int day; 
    int year; 
}; //<----------------------

*cough*

It gets me every time, too.

You too? I really wish I had a dollar for every time I've done that to myself... and I even missed it in his code... my bad.

First, lets view the question...
(i) Declare a tagged structure called DATE which consists of the following members:
month (eg. 12)
day (eg. 5)
year (eg. 2001)

(ii) Using typedef, declare a structure called STUDENT with the following members:
StudentName (eg. Wilson Tan Wing Soon)
ICNo (eg. 890225-06-0025)
BirthDate (eg. as in (i) shown above)

(iii) Using typedef, declare a structure called COURSE which is used to store course data. The structure must contain the following details:
CourseTitle (eg. Diploma in Computer System Engineering)
CommencingDate (eg. as in (i) above)
StudentData (eg. as in (ii) above, there are 10 of these)

(iv) Define a variable called IBcourse of the type COURSE which was declared in (iii).

__________________________________________________ _______
My coding below....

Code:

#include <stdio.h>
#include <stdlib.h>

struct DATE {

    int month;

    int day;

    int year;

} DATE;

typedef struct{

  char name[30];

  char ic[30];

  struct DATE birthdate;

  } STUDENT;

  typedef struct {

    char course[30];

    struct DATE commencingdate;

    struct STUDENT studentdata;

  } COURSE;



int main(void)

{




    return 0;

}

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So far, I have done until (iii). Now I have been stuck on 1 error.
C:\Documents and Settings\Administrator\Desktop\Q5.c|30|error: field 'studentdata' has incomplete type|
||=== Build finished: 1 errors, 0 warnings ===|
__________________________________________________ _____
Please help me solve this error please ~ And also how can I done (iv)? Very thanks you ~

Code:

struct DATE {
 
    int month;
 
    int day;
 
    int year;
 
} DATE;

This isn't a typedef. It simply defines a structure of type 'struct DATE', and then declares a variable of that type called 'DATE'. To make additional instances of this type, you need to use 'struct DATE' everywhere you want one.

Code:

typedef struct{
 
  char name[30];
 
  char ic[30];
 
  struct DATE birthdate;
 
  } STUDENT;

This does use a typedef, making a new type called 'STUDENT'. Every time you want an instance of this type, you now just need to write 'STUDENT varname;'

Code:

  typedef struct {
 
    char course[30];
 
    struct DATE commencingdate; // that is correct
 
    struct STUDENT studentdata; // this is not
 
  } COURSE;

Quzah.

Oh,...I understand but how can I do number (iv)? What does (iv) mean?

It means to make an instance of COURSE that is called IBcourse. Just what it says:

Originally Posted by you

Define a variable called IBcourse of the type COURSE which was declared in (iii).

Quzah.

Ok...below is the code. Am I do right for (iv)?

Code:

#include <stdio.h>
#include <stdlib.h>

    struct DATE {

        int month;

        int day;

        int year;

} DATE;

    typedef struct{

        char name[30];

        char ic[30];

        struct DATE birthdate;

  } STUDENT;

  typedef struct {

        char course[30];

        struct DATE commencingdate; // struct need struct

        STUDENT studentdata; // typedef no need struct

  } COURSE;


  int main(void)

    {
        COURSE IBcourse;




        return 0;

    }

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