GUI button problem

Unity Engine
1

Hi,
how can i use array as text on GUI button?
GUI buttons like that

if
(GUI.Button(Rect(Screen.width/4,Screen.height/8,Screen.width/2,Screen.height/8), a[0] )) {
Application.LoadLevel (1);
}

doesn’t work.

2

‘Ambiguous reference’
You need to make it less ambiguous. When you define ‘a’, give it a type