How does this not work? (structures)

This is a discussion on How does this not work? (structures) within the C++ Programming forums, part of the General Programming Boards category; Hi folks, I'm pretty new to C++ and I tried to write a little something, just to try out my ...

  1. #1
    Registered User
    Join Date
    May 2011
    Posts
    1

    Question How does this not work? (structures)

    Hi folks,

    I'm pretty new to C++ and I tried to write a little something, just to try out my newly aqquired skills- But somehow it doesnt work and I dont quiet get the error-messages. Could somebody please have a look at this?

    best wishes Alekij

    Code:
    #include <iostream>
    
    using namespace std;
    
    struct data
    {
      int id;
      int age;
      int phone;
    }
    
    void print(data)
    {
      cout<<"ID:  " <<data.id <<"\n" <<"Age:  " <<data.age << "\n" <<"Phone:  " <<data.phone;
    }
    
    int main()
    {
      data alex;
      alex.id = 1;
      alex.age = 23;
      alex.phone = 123456;
      data tesa;
      tesa.id = 2;
      tesa.age = 26;
      tesa.phone = 234567;
      cout<<"Bitte geben sie eine Person ein.\n" <<"1   Alex\n" <<"2    Tesa\n";
      int input;
      switch(input)
      {
          case 1:
            print(alex);
            break;
          case 2:
            print(tesa);
            break;
      }
      cin.get();
    }

  2. #2
    Registered User
    Join Date
    Apr 2009
    Posts
    11
    When declaring a struct you need to add a semicolon after the declaration, for example:

    Code:
    struct data
    {
      int id;
    }; <-- notice the semicolon
    Also you've declared the data type being passed to your print function, but not its name. Use this instead:
    Code:
    void print(data currentdata)
    {
      cout<<"ID:  " <<currentdata.id <<"\n" <<"Age:  " <<currentdata.age << "\n" <<"Phone:  " <<currentdata.phone;
    }
    Try reading the compiler error messages, they are usually pretty handy at identifying the source of the problem even though its quite difficult at first.

  3. #3
    a_capitalist_story
    Join Date
    Dec 2007
    Posts
    2,652
    Code:
    int input;
      switch(input)
    You're also not getting any input here. You need to get input from the user (through cin), then enter the switch.

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