struct definition

This is a discussion on struct definition within the C Programming forums, part of the General Programming Boards category; I am relatively new to c, and I get structures and how they work, but in my c book it ...

  1. #1
    Obsessed with C chrismiceli's Avatar
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    struct definition

    I am relatively new to c, and I get structures and how they work, but in my c book it says to declare them like this

    struct name {
    type name;
    } variable

    or you can do this

    struct name {
    type name;
    }
    struct name variable;
    I saw the other day that you don't need to give the structure a name, you can just do this
    struct {
    type name;
    } variable

    they both work, can someone explain this to me, why is there two ways?

  2. #2
    Code Goddess Prelude's Avatar
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    The first two create a named structure. You can make multiple variables of a named structure throughout your program. The last creates an unnamed structure, you can only create variables of that structure at the structure declaration:
    Code:
    struct A {
        ...
    } var1; /* Good */
    
    ...
    
    struct A var2; /* Good */
    Code:
    struct {
        ...
    } var; /* Good */
    
    /* You can't make any more variables of the unnamed structure. */
    My best code is written with the delete key.

  3. #3
    Obsessed with C chrismiceli's Avatar
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    thanx

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