identifier expected

im trying to create a health bar using a tutorial i found but at "public void AdjustcurHealth (adj)" it says identifier expected

tutorial: http://wiki.unity3d.com/index.php/Health_Bar_Tutorial

help?

UPDATE: ok i got that fixed but now i got a new problem it says Unexpected symbol `/'

 public class healthbar : MonoBehaviour {
         private int maxhealth = 100;
         public int curHealth = 100;
     
         private float healthBarLength;
     
         // Use this for initialization
         void Start () {
             healthBarLength = Screen.width / 2;
         }
         
         // Update is called once per frame
         void Update () {
             AdjustcurHealth(0);
         }
         void OnGUI (){
             GUI.Box(new Rect(10,10, healthBarLength,20), curHealth.ToString "/" maxhealth.ToString);
         }
         public void AdjustcurHealth (adj) {
             curHealth += adj;
     
             if(curHealth > 0)
                 curHealth = 0;
     
             if(curHealth > maxhealth)
                 curHealth = maxhealth;
     
             if(maxhealth < 1)
                 maxhealth = 1;
     
             healthBarLength = (Screen.width / 2) * (curHealth / (float)maxhealth);
     
         }
     }