i keep getting error code CS0103

Hi, i am new to Unity so sorry if this is an obvious question but i keep getting this error message:
Assets/Healthbar.cs(17,17): error CS0103: The name `addjustcurHealth’ does not exist in the current context
I have tried to fix it but more errors keep popping up this is the script:

using UnityEngine;
using System.Collections;

public class Healthbar : MonoBehaviour {
	public int maxHealth = 100;
	public int curHealth = 100;
    public float healthBarLength;
	//Use this for inialization
	void start () {
		healthBarLength = Screen.width / 2;
	//Update is called once per frame
	void update () {
	void OnGUI() {
		GUI.Box(new Rect( 10, 10, healthBarLength, 20),curHealth + "/" + maxHealth);
	public void AddjustCurrentHealth(int adj) {
		curHealth += adj;
		healthBarLength = (Screen.width / 2) * (curHealth / (float)maxHealth);

i am using it in an rpg if this makes and difference and have connected it to the first person controller.

Unity is right: addjustcurHealth does not exist in this script - do you mean AddjustCurrentHealth? Case matters in Unity, and the names are different anyway - by the way, the same applies to update and start: they should be Update and Start