static void Main(string[] args)
        {
            int a, b;
            
            float c;
             a = Convert.ToInt32(Console.ReadLine());
             b = Convert.ToInt32(Console.ReadLine());
             c = divide("c");
            Console.WriteLine(c );
     
        }
float   divide( int a, int b)
        {
            float c=0;
            if (b == 0)
                Console.WriteLine("除数不能为0！");
            else
              c = (float)a / b;
          return c;
        }
自己写起来始终有错，哪位高手能帮忙解决一下啊