求数组最小公约数

1. public class Divisor
   {
       private static Divisor instance;
   
       public static Divisor Instance
       {
           get {if(instance == null)
                   instance = new Divisor();
           return instance;
           }
       }
   
       float y, minDivisor;
       public float MinDivisor(float x1,float x2,float lerp)
       {
           if (x1 < 0 || x2 < 0 || lerp < 0)
               return 0;
           float y = x1 % x2;
           if (y > lerp)
           {
               x1 = x2;
               x2 = y;
               MinDivisor(x1, x2,lerp);
           }
           else
               minDivisor = x2;
           return minDivisor;
       }
   
       public float MinDivisor(float[] X_Arroy, float lerp)
       {
           List<float> div_Arroy = new List<float>();
           for (int i = 0; i < X_Arroy.Length-1; i++)
           {
               div_Arroy.Add(MinDivisor(X_Arroy[i], X_Arroy[i + 1], lerp));
           }
           if (div_Arroy.Count > 1)
               return MinDivisor(div_Arroy.ToArray(), lerp);
           else
               return div_Arroy[0];
       }
   }