im having trouble with raycast shooting script

well its in the description. i am getting some errors and i cant figure out what is going on. here is the script, and thanks in advance

var Bullets : int; var CanShoot : boolean; var TheDamage = 10; var reloadTime = 5; var totalAmmo = 60; var reloadAmount = 30;

function Update ()

if (totalAmmo < 1) { CanShoot == false; }

if (totalAmmo > 0) { CanShoot == true; }

{ if (CanShoot == false) reload();
}
if (CanShoot == true) { Shoot(); }

function Shoot () {

var ray: Ray = Camera.main.ScreenPointToRay(Vector3(Screen.width*0.5, Screen.height*0.5, 0));

if (Input.GetMouseButtonDown(0)) { if (Physics.Raycast (ray, hit, 100)) { hit.transform.SendMessage("ApplyDamage", TheDamage, SendMessageOptions.DontRequireReceiver); } } }

function reload () {

if(Input.GetKeyDown("r")) {

yield WaitForSeconds(reloadTime); //waits for "reloadTime" before adding ammo

ammoCount += reloadAmount; //adds ammo to our "clip" based off the reloadAmount

totalAmmo -= reloadAmount; //subtracts whatever the reloadAmount was from our total ammo every time we reload

}

}

 static function Raycast(origin: Vector3, direction: Vector3, distance: float = $$anonymous$$athf.Infinity, layer$$anonymous$$ask: int = DefaultRaycastLayers): bool;