/******************************
*   p4_8.cpp                   *
*  函數模板                    *
*******************************/
#include<iostream>
using namespace std;
template <class T1,class T2>
T1 add(T1 x, T2 y)
{ 
	cout<<"("<<sizeof(T1)<<","<<sizeof(T2)<<")\t";
	return x+y; 
}
void main()
{ 
   cout<<add(9,8)<<endl;
   cout<<add(9.0,8.0)<<endl;
   cout<<add(9,8.0)<<endl;
   cout<<add(9.0,8)<<endl;
   cout<<add('A','A'-'0')<<endl;
   cout<<add(long double(8),9)<<endl;
}