Reduce two variables with each other

I have a car and some enemies in my scene.
The enemy has a script with a Health Int
The car also Has a script with a Health Int
When They both Collide They reduce their healths
EnemyHealth - CarHealth
CarHealth - EnemyHealth
(The car Health is mostly higher than enemy health)
I tried many ways in doing this but either the Cars health will increase instead of Decreasing
or Enemy Health Will Increase Instead Of Decreasing

//Enemy

Code (CSharp):

1.     public void TakeDamage ( int damage , bool isAlly , GameObject Damager )
2.     {
3.         int HealthRecord;
4.         HealthRecord = Health;
5.         Health = Health - damage;
6.         Debug.Log (transform.name + Health);
7.         if (isAlly)
8.         {
9.             Damager.GetComponent<Ally>().TakeDamageAlly ( HealthRecord );
10.         }
11.     }

//Car

Code (CSharp):

1.         void OnCollisionEnter (Collision target)
2.         {
3.             if ( target.gameObject.tag == EnemyTag )
4.             {
5.                 Debug.Log ("Enemy Collision Detected" + target.gameObject.name );
6.                 EnemyHealthRecord = target.gameObject.GetComponent<Enemy>().Health;
7.                 target.gameObject.GetComponent<Enemy>().TakeDamage( AllyHealth , true , this.gameObject );
8.                 AllyHealth -= EnemyHealthRecord;
9.                 StartAllyHealth = AllyHealth;
10.             }
11.         }
12.  
13.     public void TakeDamageAlly ( int damage )
14.     {
15.          AllyHealth -= damage;      
16.     }

The Health Variables are just public in the script and Declared in the inspector
Like

Code (CSharp):

1. public int Health;

I couldn't get this to work
Thanks in Advance,
Dev

 

Have you tried stepping through your code with the debugger?

 

What is the Debugger???
I Don't Know What it is
Do you find anything wrong with my code???

 

I got it Working
Here is the Code that worked BTW

Code (CSharp):

1.         void OnCollisionEnter (Collision target)
2.         {
3.             int EnemyHealthTemp;
4.             int AllyHealthTemp;
5.  
6.             if ( target.gameObject.tag == EnemyTag )
7.             {
8.  
9.                 Debug.Log ("Enemy Collision Detected" + target.gameObject.name );
10.                 EnemyHealthTemp = target.gameObject.GetComponent<Enemy>().Health;
11.                 AllyHealthTemp = AllyHealth;
12.                 target.gameObject.GetComponent<Enemy>().Health -= AllyHealthTemp;
13.                 AllyHealth -= EnemyHealthTemp;
14.             }
15.         }

Thanks to everyone who replied

 

Highly recommend learning about break points and attaching the debugger. It's an invaluable to for your arsenal!