how to attach scripts for the clone player at run time?

Unity Engine
1

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i got 2 scene,one for character, one for gamescene, how can i attach scripts for the clone player??
i try to use addcomponent, but it doesn’t work

2 
GameObject prefab;

void Start()
{
    GameObject clone = Instantiate(prefab, Vector3.zero, Quaternion.identity);
    clone.AddComponent<YourScript>();
}