Thread: 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();
}

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.

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.