Question please help line 17, 35, 39 it says identifier excpected

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5. using UnityEngine.EventSystems;
6.  
7. public class JoyStick : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IDragHandler {
8.  
9.     private Image treshold;
10.     private Image touch;
11.  
12.     [HideInInspector]
13.     public Vector3 InputDir;
14.     [HideInInspector]
15.     public bool shoot;
16.  
17.     public void OnDrag(UnityEngine,EventSystems PointerEventData ,data) {
18.         Vector2 position = Vector2.zero;
19.  
20.         if (RectTransformUtility.ScreenPointToLocalPointInRectangle (treshold.rectTransform,
21.                 eventData.position,
22.                 eventData.pressEventCamera,
23.                 out position)) {
24.             position.x = (position.x / treshold.rectTransform.sizeDelta.x);
25.             position.y = (position.y / treshold.rectTransform.sizeDelta.y);
26.        
27.             float x = (treshold.rectTransform.pivot.x == 1f) ? position.x * 2 + 1 : position.x * 2 - 1;
28.             float y = (treshold.rectTransform.pivot.y == 1f) ? position.y * 2 + 1 : position.y * 2 - 1;    
29.        
30.             InputDir = new Vector3(x, y, 0);
31.             InputDir = (InputDir.magnitude > 1) ? InputDir.normalized : InputDir;
32.         }
33.     }
34.  
35.     public void OnPointerDown (UnityEngine.EventSystems PointerEventData ,data) {
36.         throw new System.NotImplementedException();
37.     }
38.  
39.     public void OnPointerUp(UnityEngine.EventSystems PointerEventData ,data) {
40.         throw new System.NotImplementedException();
41.     }
42.     // When The Scene Starts
43.     void Start(){
44.         treshold = GetComponent<Image> ();
45.         touch = transform.GetChild (0).GetComponent<Image> ();
46.         InputDir = Vector3.zero;
47.     }
48. }

 

Code (CSharp):

1. UnityEngine.EventSystems PointerEventData ,data

should be

Code (CSharp):

1. UnityEngine.EventSystems.PointerEventData data

in all those places. You must have copied and pasted or copied something wrong.

 

Code (CSharp):

1. public void OnDrag(UnityEngine.EventSystems PointerEventData ,data)

it says i need to put a identifier i tried removing the comma but then it just made another error saying "," expected

 

"UnityEngine.EventSystems.PointerEventData" is the type.
"data" is the identifier. An identifier is just a name for a variable.

Make sure that's exactly what you have everywhere. Currently in some places you're using a comma(,) instead of a period(.) or you're missing a period. Look closely.