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   源码介绍

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private void Compute()
        {
            for (int i = 0; i < 100; i )
            {
                double distance = -1;
                for (int j = 0; j < 4; j )
                {
                    int tempDistance = (this.Center[j].X - this.Points[i].X) * (this.Center[j].X - this.Points[i].X) (this.Center[j].Y - this.Points[i].Y) * (this.Center[j].Y - this.Points[i].Y);

                    if ((Math.Sqrt(tempDistance) < distance) || j == 0)
                    {
                        distance = Math.Sqrt(tempDistance);
                        Points[i].Focus = j;
                    }
                }
            }
        }

        /// <summary>
        /// 更新中心
        /// </summary>
        private void UpdateCenter()
        {
            for (int i = 0; i < this.K; i )
            {
                int x = 0, y = 0, count = 0;
                for (int j = 0; j < 100; j )
                {
                    if (Points[j].Focus == i)
                    {
                        x = Points[j].X;
                        y = Points[j].Y;
                        count ;
                    }
                }
                //利用三目运算符，防止出现除以0的不合法运算
                x = x / (count == 0 ? 1 : count);
                y = y / (count == 0 ? 1 : count);
                Center[i].X = x;
                Center[i].Y = y;
            }
        }