How to use Sphere colliders to detect the "Player"

can someone break this down for me and explain this further?

Use triggers. A simple sphere trigger can work wonders though. You get OnTriggerEnter/Exit calls when exiting the sphere of influence you want

Code (csharp):

1. function OnTriggerEnter (c : Collider)
2. {
3.     if (c.CompareTag("Player"))
4.         enabled = true;
5. }
6.  
7. function OnTriggerExit (c : Collider)
8. {
9.     if (c.CompareTag("Player"))
10.         enabled = false;
11. }
12.  

Everytime i try and this script in, iget a lot of errors and i must be doing something wrong.

 

Which errors are you getting?