Vala files import - linux

Question

I have a problem when work with properties in separated files in Vala Language
The Main.vala file is
using Teste;
using Cagado;
static int main(string[] args)
{
GUI gui = new GUI();
stdout.printf("%d\n", gui.idade);
return 0;
}
The HelloVala.vala is:
namespace Teste
{
public class Person : Object
{
private int _age = 32;
public int age
{
get { return _age; }
set { _age = value; }
}
}
}
The Cagado.vala is:
using Teste;
namespace Cagado
{
public class GUI : Object
{
Person _person = new Person();
_person.age = 35;
private int _idade;
public int idade
{
get { return _idade; }
set { _idade = value; }
}
}
}
When i compile this code, the compile gives me the message error:
Cagado.vala:9.15-9.15: error: syntax error, expected identifier
_person.age = 35;
^
I program in C# and this not happened in C# oriented object system.
Someone could explain this?

Answer 1

The problem is this:
public class GUI : Object
{
Person _person = new Person();
_person.age = 35; // <--
...
You can't put arbitrary code inside of the class itself, only declarations. What you need to do is something like
public class GUI : Objects
{
Person _person = new Person();
construct {
_person.age = 35;
}
You could also modify add a constructor to the Person class:
namespace Teste
{
public class Person : Object
{
private int _age = 32;
public int age
{
get { return _age; }
set { _age = value; }
}
public Person(int age) {
GLib.Object (age: age);
}
}
}
Then do
public class GUI : Object
{
Person _person = new Person(35);