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Question by dylan760 · Aug 22, 2014 at 12:58 PM · c#programmingaccessing from any script

Cannot implicitly convert type `int' to `healthgui'

i am trying to make a command where: you press the space bar button and the health bar goes down by 10 health, but i am accessing this health variable from another script, i did everything the tutorial told me too and i keep getting this error message: Cannot implicitly convert type int' to healthgui'

this is my code where my health is located:

 using UnityEngine;
 using System.Collections;
 
 public class healthgui : MonoBehaviour {
     //these floats are used to easily configure the GUI Image//
 
     //health image size and positioning floats//
     public float guiHealthWidth;
     public float guiHealthHeight;
     public float guiHealthDistLeft;
     public float guiHealthDistTop;
 
 
     public int health = 100;
     public GUIStyle healthbar;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void OnGUI () {
 
         //Displays health Hud//
     GUI.Box (new Rect(
             (Screen.width/16) * guiHealthDistLeft,
             (Screen.height/16) * guiHealthDistTop,
             (Screen.width/16) * guiHealthWidth,
             (Screen.height/16) * guiHealthHeight),
              health.ToString(),healthbar);
 
 
     }


and this is where my health accessor is located:

 using UnityEngine;
 using System.Collections;
 
 public class keyboard : MonoBehaviour {
 
     private healthgui heal;
 
     // Use this for initialization
     void awake () {
         heal = this.gameObject.GetComponent<healthgui>().health;
     
     }
     
     // Update is called once per frame
     void Update () {
 
         int newHealth;
         int gethealth;
         if (Input.GetKey(KeyCode.Space)) {
 
             gethealth = heal.health;
             newHealth = heal.health - 10;
             heal.health = newHealth;
 
                 }
 
     
     }
 }
 

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Answer by Landern · Aug 22, 2014 at 01:01 PM

In your class healthgui you have a field called health, this is of type int. In keyboard you have a field called "heal", heal is of type healthgui. In awake you are getting the component for healthgui, then getting the value for the health field in that instance of healthgui. health is not of type healthgui which the field heal is. You need to remove the field health and just end it like:

 heal = this.gameObject.GetComponent<healthgui>();

It seems you access the field health in the update method anyways, this should fix your issues.

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avatar image dylan760 · Aug 22, 2014 at 01:06 PM 0
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i did but now when ever i press the space bar button it comes up with this

NullReferenceException: Object reference not set to an instance of an object keyboard.Update () (at Assets/Scripts/keyboard.cs:21)

(its attached to a camera)

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