public void sort(double[] a,int b)
   {
       for (double  i = 1.0; i < Convert.ToDouble (b - 1); i++)
       {
           double k = i;
           for (double j = i + 1; j < Convert .ToDouble (b); j++)
           {
               if (a[j] > a[k])
               { k = j;}
           }
           if (k != i)
           {
               double t = 0;
               t = a[i];
               a[i] = a[k];
               a[k] = t;
           }
       }

   }
请问这个排序方法问题出在哪里？总是报错“无法将类型double隐式转化为int，存在一个显示转换”

只要是数组a[]出现的地方都有误