I can't add script in unity

Question

I'm a beginner in unity so I got this problem. Here is the script:

using UnityEngine;
using System.Collections;
public class Playercontrol: MonoBehaviour {
    public float maxspeed = 10f;
    bool facingRight = true;

    void FixedUpdate () {
        float move = Input.GetAxis ("Horizontal");

        GetComponent<Rigidbody2D>().velocity
             = new Vector2(move * maxspeed, GetComponent<Rigidbody2D>().velocity.y);

        if (move > 0 && !facingRight){
            Flip ();
        } else if (move < 0 && facingRight) {
            Flip ();
        }
    }

    void Flip() {
        facingRight = !facingRight;
        Vector3 theScale = transform.localScale;
        theScale.x *= -1;
        transform.localScale = theScale;    
    }
}

I don't know why but it keep saying that Can't add script component 'Player control' because the script class cannot be found.Make sure that there no compile errors and that the file name and class name match.

Answer 1

Check the file name of the script and make sure it's the same as the class name. I've had this problem before after renaming a script through the editor.

Answer 2

Old question, but I solved this problem using the Help menu and then Reset Packages to defaults.

Answer 3

You either have a compile error in this script, or you have one in a different script. If this is the first time you're trying to use this script, the entire solution needs to compile before Unity knows about this new class you're introducing.

Locate your error and correct it before trying to add this script. It could be a compile error or something like a name mismatch like SanSolo suggests.