Gaining experience from enemies killed?

So i use this script for my player’s health as well as the Experience he gets to level up. My question is how should i edit it so that i will able to get some XP from the enemies i kill? Thanks!

var maxHealth : int = 100;
var curXP : int = 0;
var maxXP : int = 240;
var level : int = 1;
function Start(){
healthRegen();
}
function OnGUI(){
GUI.Box(new Rect(5,405,200,20), curHealth + “/” + maxHealth);
GUI.Box(new Rect(5,430,200,20), "Level " + level + " XP " + curXP + " / " + maxXP);

if(curXP == maxXP){
	levelUpSystem();
}
if(curHealth < 0){
	curHealth = 0;
}
if(curHealth > maxHealth){
	curHealth = maxHealth;
}
if(Input.GetKeyDown("e")){
	curHealth -= 10;
}
if(Input.GetKeyDown("r")){
	curXP += 10;
}	

}
function healthRegen() {
for(i=1;i>0;i++){

yield WaitForSeconds(0.5);

if(curHealth < maxHealth){

curHealth++;
}
}

}
function levelUpSystem(){
curXP = 0;
maxXP = maxXP + 50;
level++;

maxHealth += 100;

}

On your enemy script, just before the enemy dies, right before the enemy gameObject is removed.
add this code.

curXP += 10;

But it might not work straight away, as you will need to make the enemy script recognises what curXP actually is. watch some tutorials if you get stuck.