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Nested Structure help ~

This is a discussion on Nested Structure help ~ within the C Programming forums, part of the General Programming Boards category; First, lets view the question... (i) Declare a tagged structure called DATE which consists of the following members: month (eg. ...

  1. #1
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    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)
    __________________________________________________ _____
    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;
    
    }


    __________________________________________________

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

  2. #2
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    Quote Originally Posted by Siaw View Post
    Help me ~ what mean by (ii) BirthDate? It say shown above?
    Code:
    typedef struct{
      char name[30];
      char ic[30];
      DATE birthdate;
      } STUDENT;

  3. #3
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    Oh...I understand but now got an error...
    Error below
    __________________________________________________ _______
    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 ===|
    __________________________________________________ ___

    How can I solve this error?

  4. #4
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    Code:
    typedef struct{
      char name[30];
      char ic[30];
      struct DATE birthdate;
      } STUDENT;

  5. #5
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    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 ===|

    __________________________________________________ ___

  6. #6
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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.

  7. #7
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    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;
    
    }

  8. #8
    Just a pushpin. bernt's Avatar
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    Code:
    struct DATE { 
        int month; 
        int day; 
        int year; 
    }; //<----------------------
    *cough*

    It gets me every time, too.
    CommonTater likes this.
    Consider this post signed

  9. #9
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    Lol...I never thinks is this problem....very thanks

  10. #10
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    Quote Originally Posted by bernt View Post
    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.

  11. #11
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    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;
    
    }


    __________________________________________________ ___
    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 ~

  12. #12
    ATH0 quzah's Avatar
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    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.
    Hope is the first step on the road to disappointment.

  13. #13
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    Oh,...I understand but how can I do number (iv)? What does (iv) mean?

  14. #14
    ATH0 quzah's Avatar
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    It means to make an instance of COURSE that is called IBcourse. Just what it says:
    Quote Originally Posted by you
    Define a variable called IBcourse of the type COURSE which was declared in (iii).

    Quzah.
    Hope is the first step on the road to disappointment.

  15. #15
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    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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