托管C++中函数调用的双重转换

using namespace System; 
#define ARRAY_SIZE 1000 

struct bubbleBase 
{ 
 int value; 
}; 
class bubble1:public bubbleBase 
{ 
public: 
 virtual int getvalue(){return value;} 
 virtual void setvalue(int newvalue){value=newvalue;} 
}; 
class bubble2:public bubbleBase 
{ 
public: 
 virtual int __clrcall getvalue(){return value;} 
 virtual void __clrcall setvalue(int newvalue){value=newvalue;} 
}; 
template<class T> 
void bubbleSort(int length) 
{ 
 TimeSpan ts; 
 T* array1=new T[ARRAY_SIZE]; 
 for (int i=0;i<ARRAY_SIZE ;i++) 
 { 
  array1[i].setvalue(ARRAY_SIZE-i-1); 
 } 
 Int64 ticks=DateTime::Now.Ticks; 
 int i, j,temp, test;  
 for(i = length - 1; i > 0; i--) 
 { 
  test=0; 
  for(j = 0; j < i; j++) 
  { 
   if(array1[j].getvalue() > array1[j+1].getvalue())  
   { 
    temp = array1[j].getvalue(); 
    array1[j].setvalue(array1[j+1].getvalue()); 
    array1[j+1] .setvalue(temp); 
    test=1; 
   } 
  }  
  if(test==0) break;  
 }  
 ts=TimeSpan::FromTicks(DateTime::Now.Ticks-ticks); 
 Console::WriteLine("BubbleSort {0} Items: {1}  Ticks", 
  ARRAY_SIZE, 
  ts.Ticks ); 
 delete array1; 
} 
int main(array<System::String ^> ^args) 
{ 
 bubbleSort<bubble1>(ARRAY_SIZE); 
 bubbleSort<bubble2>(ARRAY_SIZE); 
    return 0; 
}