Switching cameras Script error

I just made a script in C# and i dont know exactly what is the error . Can anyone tell me what is the error ? using UnityEngine; using System.Collections;

public class camControl : MonoBehaviour {

 // Using First
 void Start () {
     if Input.GetKey (7)
         Debug.Log ("Using Cheating 1")
             CheatingSwap(7)
 
 }
 
 // Using Second
 void Update () {
 if Input.GetKey (9)
         Debug.Log("Using Cheating 2")
             CheatingSwap(9)
 }

}

void camSwap(int currentCam) { GameObject[] cam = FindGameObjectWithTag("cheating");

 foreach (GameObject cam in cam) {
     Cam theCam = Cam.GetComponent <Camera>()as Camera
         theCam.enabled = false ; //Nu stiu
 }
 
 
 string oneToUse = "Camera" + currentCam ; 
 Camera usedCam = GameObject + GetComponent<Camera>() as Camera
     usedCamera.enabled = true ;

} }

Yeah yeah nice tag anyway anyone knows the problem? :)