Help Dynamically allocating a struct

This is a discussion on Help Dynamically allocating a struct within the C Programming forums, part of the General Programming Boards category; I am programming in GTK using C and need help solving a problem I have. I am writing a simple ...

  1. #1
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    Help Dynamically allocating a struct

    I am programming in GTK using C and need help solving a problem I have. I am writing a simple program that shows student records. The problem is that I would like to create "student" struct objects dynamically as needed, every time a new student is read from the file.

    I know I have to use malloc and my question is, would it be legal to declare a global pointer to the struct and use malloc to create new instances? Thanks.

  2. #2
    Deathray Engineer MacGyver's Avatar
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    If you malloc() and overwrite the result before calling free(), you leak memory.

    Consider using a linked list.

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    C++まいる!Cをこわせ! Elysia's Avatar
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    What's the point of using global variables when you're dynamically allocating new objects, thus overwriting the old one?
    A linked list is cool, otherwise you can use a dynamic array.
    Global variables should be avoided.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
    For information on how to enable C++11 on your compiler, look here.
    よく聞くがいい!私は天才だからね! ^_^

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    Unhappy Provide me a example

    How can i implement the above code using linked list.
    Do i need to use a pointer to the above structure
    how do i need to generate a structure array?

    I am confused

    If possible provide an example.

  5. #5
    Deathray Engineer MacGyver's Avatar
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    What above code?

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    Give the code we will try it...

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