structure in array

This is a discussion on structure in array within the C Programming forums, part of the General Programming Boards category; Hi, I'm pretty new with the notion of structure and I need some help. I would like to put, for ...

  1. #1
    Registered User
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    Mar 2007
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    structure in array

    Hi,

    I'm pretty new with the notion of structure and I need some help. I would like to put, for example, the first name, last name, age and the phone number of a person in a structure like:
    Code:
    struct
       {
           char FirstName[16];
           char LastName[16];   
           int age;
           char PhoneNumber[10];
       } person;
    My problem is that I have multiple persons (20 for example). I would like to put them all in one array that would contain the 20 structures. Could someone show me an exemple how to do this when these info are read from the keyboard and, when they are read from a .txt file.

    Thanks

  2. #2
    Frequently Quite Prolix dwks's Avatar
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    To declare an array of structures, just like declaring an array of any other type, you'd use:
    Code:
    struct
       {
           char FirstName[16];
           char LastName[16];   
           int age;
           char PhoneNumber[10];
       } person[20];
    Then you can access the members of person like so:
    Code:
    puts(person[0].FirstName);
    dwk

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  3. #3
    Lean Mean Coding Machine KONI's Avatar
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    Quote Originally Posted by nevrax View Post
    Hi,

    I'm pretty new with the notion of structure and I need some help. I would like to put, for example, the first name, last name, age and the phone number of a person in a structure like:
    Code:
    struct
       {
           char FirstName[16];
           char LastName[16];   
           int age;
           char PhoneNumber[10];
       } person;
    My problem is that I have multiple persons (20 for example). I would like to put them all in one array that would contain the 20 structures. Could someone show me an exemple how to do this when these info are read from the keyboard and, when they are read from a .txt file.

    Thanks
    Your problem is that this code defines an anonymous structure without an identifier and immediately initializes one "person". If you want to reuse the structure, you can write:

    Code:
    struct person {
           char FirstName[16];
           char LastName[16];   
           int age;
           char PhoneNumber[10];
    };
    
    int main(void)
    {
    struct person myPerson1, myPerson2, myPersonArray[20];
    }

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